You have an afternoon free and you want to walk out wearing something you made yourself. In Singapore that idea leads you down three roads: marketplace listings, independent studios, and workshops run by a jewellery school. Prices overlap, so the tag alone tells you little. Five checks separate the sessions worth your money from the ones you will forget by dinner.

Start with what you take home

Decide the object first, the venue second. A silver clay workshop ends with a finished pendant or ring in fine silver. A colourful bracelet workshop ends with strung and wired pieces you can replicate at home the same week. A design workshop ends with drawn earrings and the beginnings of a design habit rather than a wearable. None of these is the wrong choice; the wrong choice is booking a design session when your niece expects a birthday ring.

Bench time beats watching a demonstration

The value of a workshop is measured at the bench, in minutes with your own hands on the tools: rolling the clay, firing, sawing, soldering, setting. Some short sessions lean on demonstration because the format is tight; a ninety-minute class covers real bench work but the clock governs everything, as we break down in what 1.5 hours actually teaches. Ask the organizer one plain question: how much of the session do participants spend making, versus watching?

Ask who stands at the front of the room

A workshop taught by a trained jeweller or a school instructor carries craft knowledge that shows up in small moments: how you hold a file, when the metal is ready, why a seam failed. Facilitator-run craft parties can be tremendous fun and still teach you almost nothing that survives the day. When the workshop page names the instructor and their training, that is a good sign. When it names only a price, ask.

Materials, firing, and when you collect

Silver clay work has a step many listings gloss over: firing. Art Clay silver fires at a low temperature compared with cast silver, but it still needs a kiln, and some workshops fire pieces after the session ends so students collect finished work days later. Check whether the material is included in the price, whether firing is included, and whether you carry the piece home that day or collect it. None of the answers is a dealbreaker; discovering the answer at the door is.

Count the benches

Attention divides by headcount. In a group of six, the instructor reaches you every few minutes; in a group of twenty, you may wait through three mistakes before anyone notices. For a birthday or a team session a bigger group is part of the point. For learning, small wins. If the listing does not state the maximum group size, that silence is your answer.

The honest map of Singapore options

Marketplace platforms list dozens of sessions and sort by review count; quality ranges from excellent to glue-and-beads. Independent studios run dependable craft formats, often aimed at parties and dates. School-run workshops sit on training infrastructure: at JDMIS the short experience classes include silver clay, bracelet making, design, and enamelling, taught on the same campus as the career programmes, with materials and firing handled. Companies booking group sessions can also look at the corporate training options around jewellery knowledge for sales teams.

When a workshop is the wrong answer

A workshop is a taste. If you leave the bench already planning the next piece, the efficient move is a structured short course or a certificate, not another taster. The two-minute Facet Finder quiz points to the craft that suits your hands, from fabrication to design to gemmology. One good workshop tells you whether the bench is calling you. Only a course answers it.

Booking a session: individuals and pairs can reserve short experience classes on the school's published schedule; groups of ten or more, clubs and associations can arrange a hands-on workshop or a gemstone talk with JDMIS, on campus or at your venue.

Frequently asked questions — choosing a jewellery workshop

How do I choose a jewellery workshop in Singapore?

Start with what you take home, then check how much bench time you get. A silver clay session ends with a finished fine-silver piece; a bracelet session ends with strung and wired pieces; a design session ends with drawn earrings. Pick the outcome you want before comparing venues.

How long is a jewellery making workshop?

A ninety-minute class covers real bench work, but the clock governs everything: rolling, firing, sawing, soldering and setting all take time, so check how much of the session is demonstration before booking.

Are jewellery workshops good for beginners?

Yes. Beginner sessions assume no experience, and the value is measured at the bench, in minutes with your own hands on the tools.

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Coloured gemstones arranged for identification on a jeweller's workbench

Nobody identifies a gemstone by looking at it and guessing. Every confident identification rests on measurements — optical and physical properties that a stone cannot fake, whatever its colour or cut. The JDMIS gem reference organises 204 gem varieties across 83 materials into 11 colour-and-clarity families, from "Red, Pink & Purple — Transparent" to "Grey & Black", and then separates look-alikes with six measurements. Here is how each one works, with real values for stones you actually meet in Singapore workshops.

1. Start with colour and clarity

Colour comes first because it is the fastest filter. A transparent red stone is already down to a shortlist — ruby, spinel, garnet, tourmaline — before any instrument is switched on. Clarity matters just as much: the same red family splits into transparent and translucent to opaque branches, and the two branches contain different stones. Colour plus clarity puts you in the right neighbourhood; the measurements that follow tell you which house it is.

2. Single or double refraction?

Light splits into two rays inside some crystals and not others. A polariscope shows this in seconds: diamond, spinel and cubic zirconia are singly refractive, while ruby, sapphire, topaz, tourmaline and quartz are doubly refractive. That single observation rules out half a shortlist. A red stone that stays dark through a full rotation under the polariscope is not a ruby — it is behaving like a spinel or a garnet.

3. Measure the refractive index

The refractometer is the workhorse of gem testing. You place a polished facet flat on the glass prism, look through the eyepiece, and read where the shadow edge falls on a scale — the refractive index (RI).

  • Diamond: 2.417
  • Cubic zirconia: 2.15
  • Ruby and sapphire: 1.762–1.77
  • Spinel: 1.718
  • Topaz: 1.619–1.627
  • Amethyst and citrine: 1.544–1.553

A standard gem refractometer reads up to about 1.79–1.81. Diamond and cubic zirconia sit over the limit — the shadow edge runs off the top of the scale, which is itself a diagnostic result, and one reason CZ became such a convincing diamond simulant at first glance.

4. Read the birefringence

In a doubly refractive stone, the two rays travel at different speeds. The gap between them — the birefringence — is the difference between the highest and lowest RI the stone shows. Amethyst reads 1.544 to 1.553, a birefringence of 0.009; tourmaline spans 1.624 to 1.644, a spread of up to 0.020. In strongly birefringent stones you can even see facet-edge doubling with a loupe. The number is stable for each species, so it separates stones whose RI ranges overlap.

5. Check pleochroism with a dichroscope

Doubly refractive stones can show different colours along different crystal directions. A dichroscope — two small windows that show the two polarised rays side by side — makes this obvious and repeatable. Alexandrite shows strong green, orange and pink pleochroism; tourmaline is typically moderate to strong; amethyst is weak to moderate in purple tones. Singly refractive stones like spinel never pleochroise, so a dichroscope also double-checks your step-2 conclusion. Related to this is optic character: quartz and corundum are uniaxial, topaz and chrysoberyl biaxial — a finer split used when the numbers alone do not decide.

6. Fluorescence under ultraviolet light

Switch on a long-wave and short-wave UV lamp and some stones glow. Burmese ruby fluoresces strong red in long-wave UV; light Ceylon sapphires show moderate to strong blue; amethyst is usually inert, at most a weak blue in short-wave; alexandrite ranges from inert to a moderate red. Fluorescence never identifies a stone on its own — the same species can glow differently depending on its chemistry — but as a confirming signal it is fast and non-destructive.

And the tie-breaker: specific gravity

Density settles the cases the optical tests leave open. The hydrostatic method needs just a scale and a cup of water: weigh the stone in air, then suspended in water, and the two weighings give you specific gravity (SG). Diamond sits at 3.51–3.53 while cubic zirconia — visually its most convincing impersonator — is far heavier at 5.6–6. Topaz (3.49–3.57) and sapphire (3.95–4.1) can look alike in a tray; on a scale they are different stones. Quartz at 2.64–2.69 is one of the lightest gems you will handle.

Practise the whole sequence yourself

Reading numbers is one thing; running the sequence on a real stone until it becomes instinct is another. If you want to build that instinct:

Six measurements, one sequence, no guessing. That is how a professional turns "a red stone" into a name.

Keep reading: how to read a gem certificate.

Want the equipment view first? See How to Identify Gemstones at Home: 8 Tools That Work for what each instrument looks like and what it tells you.

Keep reading

Frequently asked questions

Can I really identify a gemstone at home?
Partly. Colour, a jeweller's loupe, polarizing film and a UV lamp are all within reach at home, and a kitchen scale plus water gets you specific gravity. The refractometer — the most decisive tool — is professional equipment. Follow the step-by-step at-home guide for the home sequence, and treat any valuable stone to a professional check before money changes hands.
What is the fastest way to tell cubic zirconia from diamond?
Weigh it. Cubic zirconia has a specific gravity of 5.6–6, noticeably heavier than diamond's 3.51–3.53. Both are singly refractive and both read over the limit of a standard refractometer, so the scales decide what the instruments cannot.
What does singly versus doubly refractive mean?
Some crystals split light into two rays and some do not. Under a polariscope, diamond, spinel and cubic zirconia stay singly refractive, while ruby, sapphire, topaz, tourmaline and quartz blink between light and dark — doubly refractive. It is a two-minute test that removes half of any shortlist.
What refractive index do common gemstones have?
Amethyst and citrine sit at 1.544–1.553, topaz at 1.619–1.627, spinel at 1.718, ruby and sapphire at 1.762–1.77. A standard gem refractometer reads up to about 1.79–1.81; diamond (2.417) and cubic zirconia (2.15) run off the top of the scale.
Do rubies glow under ultraviolet light?
Many do. Burmese rubies fluoresce strong red under long-wave UV, light Ceylon sapphires glow moderate to strong blue, and amethyst is usually inert. Fluorescence is a confirming signal, never a standalone verdict — the same species glows differently depending on its chemistry.
How do you identify a gemstone still embedded in rock?
Rarely with certainty in the field. Gemstone varieties are classified by their physical and optical characteristics — chemical composition, crystal structure, transparency, refractive index, birefringence, specific gravity and pleochroism — and rough material locked in a rock matrix hides most of those clues. It is only through gemmological equipment that accurate properties can be obtained and an identity deduced, by eliminating possibilities that do not match.
Can you test an opaque or rough stone with a polariscope?
No. The polariscope works by observing the light that passes through the material, so it can only be used on transparent and translucent stones — opaque stones return no usable reading, which is exactly the situation with many rough specimens still in matrix.

Explore further: play Name That Gem, a free gem-identification game, or trace gems to their sources on the Gem Globe.

A beginner metalsmithing bench laid out with saw frame, butane torch, soldering block and copper wire links

Most people picture a metalsmith hammering away in sparks and shadow. The reality of a foundation course is quieter and more precise: a portable bench, a butane torch, a saw frame, and a set of skills that jewellers have refined for a thousand years. The JDMIS Certificate in Traditional Metalsmithing 1 walks beginners through that entire toolkit in three hands-on projects — and this article is a taste of what the journey looks like from the bench.

Two ways to make a piece of jewellery

Everything starts with a fork in the road. Fabrication means working directly with sheet and wire — cutting, folding, hammering and joining the metal into its final form. It suits one-off designs, and the repeated working actually hardens the metal, so the finished piece resists dents and distortion. Lost-wax casting instead carves a wax model, surrounds it with a mould, burns the wax out and pours molten metal into the void it leaves behind — the route taken when a design needs to be reproduced. A foundation course teaches fabrication first, because it builds the hand skills every other method leans on.

The metal itself: sheet, wire, gauge

Hand-fabrication metal arrives in two basic forms. Sheet is sold in paper-like thicknesses and becomes anything from a pierced pendant to a ring's top plate. Wire runs from rod-like thicknesses (ring and bangle shanks, hinge inserts) down to the fine strands used for prongs and chain links. Thickness for both is measured in gauge, and the scale runs backwards: the higher the number, the thinner the metal. When ready-made sheet or wire is not available — or when offcuts are too valuable to waste — metalsmiths melt scrap into an ingot and roll or draw it down themselves, exactly as jewellers have done since the ancient Egyptians beat ingots flat by hand.

Alloying matters here too. Pure precious metals are usually too soft for daily wear, so they are blended with harder metals — sterling silver's 925 mark means 925 parts silver per thousand. Stamping a quality mark is a legal guarantee of minimum purity; marking gold with a higher karat than it contains ("underkarating") is a prosecutable offence.

The core skills, in the order you meet them

Annealing and pickling. Silver and copper stiffen as you work them. Heating them to a dull red (annealing) restores their softness; an acid bath (pickling) cleans away the oxide scale that firing leaves behind. One of the course's parting gifts is a household recipe: two parts white vinegar to one part hydrogen peroxide makes peracetic acid, a slow but safe pickle for brass and nickel silver.

Sawing and piercing. The jeweller's saw is the precision tool of the whole craft — used to cut strip from sheet, to open a coil of wire into jump rings, and to pierce decorative openings out of a pendant's centre.

Soldering. Joins are not glued; they are fused with solder that flows at a lower temperature than the parent metal, graded hard, medium and easy so that a piece can be assembled in stages without earlier joins failing. Our silver soldering guide covers when each grade is used — and when fusing beats soldering altogether.

Texturing. Hammer blows on a steel block, patterns roll-printed into sheet through a rolling mill (lace, mesh, dry leaves all work), and steel punches for stamping — texture is where a first student's personal style starts to show.

The flex shaft. The bench's motor-driven rotary tool takes over where files leave off: grinding, sanding and polishing with an 80-piece accessory set.

The three projects

Skills only stick when they build something real. The course is structured around three pieces, each one layered on the last:

  • Project 1 — Textured copper link bracelet. Anneal 12-gauge copper wire, coil it around a steel rod, saw the coil into links, file every joint until no light passes through, then solder each link closed and texture it. Repetition is the teacher.
  • Project 2 — Pierced pendant with a roll-printed background. Two layers of sheet: a textured base roll-printed with a found surface, and an openwork top sawn out of a drawn design, sweat-soldered together.
  • Project 3 — Silver ring with a bezel-set cabochon. The graduation piece. Measure the finger, calculate the shank length, form and solder the band, then make and fit the bezel that grips the stone — the technique we detail in how to bezel-set a cabochon. Sizing has its own subtleties, which is why we keep a separate ring size guide.

Time permitting, a fourth project adds fabricated earrings with hand-made ear wires.

Why designers take a bench course

The course book makes a point that surprises students: even if you never manufacture your own designs, understanding construction makes you a better designer. Knowing what a saw can cut, what solder can bridge, and how a bezel actually grips a stone prevents designs that no craftsperson can execute — and saves the cost of discovering that at the bench. Quality in workmanship, the book stresses, is what separates a well-made piece from a rushed one, and you can only judge it once you have produced it yourself.

Where it leads

Traditional Metalsmithing 1 is the first step of JDMIS's precious metal arts programme: from here, students move on to intermediate techniques and stone setting, building toward the Diploma in Precious Metal Arts. The first bracelet may be copper — but the skills are pure silver.

Explore further: find your Artisan Archetype — which maker are you? — or get an AI-guided course consultation.

Visual reference

Pouring a silver ingot: the start of a metalsmithing foundation
Pouring a silver ingot: the start of a metalsmithing foundation
Lost-wax casting: where metalsmithing training leads
Lost-wax casting: where metalsmithing training leads

Frequently asked questions — traditional metalsmithing

What is a traditional metalsmithing course?

A hands-on foundation course in fabrication: cutting, folding, hammering and joining sheet and wire into finished jewellery, using a portable bench, butane torch and saw frame. JDMIS's Certificate in Traditional Metalsmithing 1 teaches the toolkit through three hands-on projects.

Do I need experience to start?

No. The course walks beginners through the entire toolkit from the first session.

Why learn fabrication before casting?

Fabrication builds the hand skills every other technique depends on. Lost-wax casting reproduces a design, but the wax model still has to be carved by someone who understands how metal behaves.

A jeweller measuring a ring size with a ring sizer set and ring stick

Ring sizes look simple until a customer from another country walks in. The numbers used in Hong Kong are different from those in Japan, which are different from those in the USA — and the UK uses letters instead of numbers. Jewellers cut through the confusion with one universal measurement: the inside diameter of the ring in millimetres, taken at the widest point of the finger-hole.

This guide is adapted from the JDMIS creative-drawing course book — the same material our students use before they draw a ring in actual size, because a ring drawn the wrong size becomes a ring that has to be resized at the store's cost.

A jeweller's ring sizer set and ring stick for measuring ring sizes
A jeweller's ring sizer set and ring stick for measuring ring sizes

Singapore follows the Hong Kong system

Singapore tends to follow the Hong Kong sizing system. That matters for two reasons: a size quoted by a local customer is an HK size, and a size quoted by an overseas customer — or an online chart — may be in US, Japanese or UK letters instead. Every size, whatever its label, corresponds to one inside-diameter measurement in millimetres, and that millimetre figure is what a designer or jeweller actually works to.

How to measure a ring size correctly

The professional tool is the ring sizer: a set of rings in full, half and sometimes quarter sizes, tried on the finger until one fits the way a finished ring should. Fit matters — a sizer worn too loose produces a ring that spins; too tight, and the finished band will not go on.

When the ring is a gift and the wearer is not available, the next best option is a ring the person already wears on the intended finger. A jeweller measures it directly on a ring stick, or measures across the widest inside diameter and converts the millimetres back to a size using a conversion chart. Whatever size a customer gives you, it is wise to check and double-check it yourself and convert it directly to the millimetre measurement.

From millimetres to a drawing

Chart measurements are written to one hundredth of a millimetre, but a drawing cannot practically be made to that precision. The course rule is simple:

  • Round up to the nearest whole millimetre when the decimal is 0.50 or more (15.79 mm → 16 mm)
  • Round down to the nearest whole millimetre when the decimal is 0.49 or less (15.33 mm → 15 mm)

Drawn at that rounded actual size, the design carries exactly the size the workshop needs — and the customer gets a ring that fits the first time.

Why accuracy is worth the effort

A ring not produced to scale has repercussions: the cost of enlarging or reducing it is borne by the store or the designer, and even when the customer pays nothing, they wait for the alteration or wear an uncomfortable ring. Neither is a good way to be remembered. Measuring carefully, converting to millimetres and drawing to actual size is the professional habit that prevents all of it.

Learn to draw rings to scale

Measuring is step one; drawing is where the design happens. Our guide to drawing rings to scale covers the guidelines and proportions, and the Creative Jewellery Drawing certificate course teaches the full process — top view, side view and preparation for production — in small classes in Singapore. Related reading: every type of jewellery, with pictures.

Frequently asked questions

What ring size system does Singapore use?

Singapore tends to follow the Hong Kong sizing system. Sizes quoted locally are HK sizes; overseas sizes (US, Japanese, UK letters) should be converted to the millimetre inside diameter before a ring is made.

How do you convert between ring size systems?

Through the inside diameter of the ring measured in millimetres at the widest point of the finger-hole. Every country's size corresponds to one millimetre measurement, so the millimetre figure is the common language between systems.

How can I find someone's ring size as a surprise gift?

Borrow a ring they already wear on the intended finger. A jeweller measures it on a ring stick, or measures the widest inside diameter and converts the millimetres to a size. It is the next best option after measuring the finger directly.

What tool do jewellers use to measure ring size?

A ring sizer: a set of rings in full, half and sometimes quarter sizes, tried on the finger until one fits the way the finished ring should.

Do UK ring sizes use numbers?

No - the UK uses letters instead of numbers. Hong Kong, Japan and the USA each use their own numbering, which is why jewellers convert everything to millimetres.

How precise does a ring size need to be when drawing?

Charts are written to one hundredth of a millimetre, but drawings round to whole millimetres: up when the decimal is 0.50 or more, down when it is 0.49 or less.

Explore further: find your Artisan Archetype in JDMIS’s visual quiz, or book a visit to the school.

  1. Drawing Complex Shapes in Top, Side and End Views
  2. Jewellery Designer Productivity: Efficiency, Effectiveness and Measurement
  3. Before You Start Designing: Posture, Pencils and First Exercises
  4. Sketching Jewellery Designs Freehand: Getting Proportions Right
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