JMA Hong Kong International Jewelry Show

Attendees, exhibitors & solutions

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Industry trends

Key trends shaping this market and its wider industry.

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Frequently asked

Glossary

1

Carat (ct)

The unit of weight for gemstones and pearls; 1 carat equals 0.2 grams. At the Hong Kong show, loose diamonds, coloured stones and melee parcels are quoted per carat, so buyers compare price-per-carat rather than price-per-piece when sourcing.

2

Karat (K)

Gold purity expressed in 24ths. 18K is 75% gold, 14K is 58.3% and 22K is 91.6%. Hong Kong manufacturers usually mark export lines in 18K or 14K and domestic Chinese-market gold in 22K or 999.9 fineness.

3

999.9 fine gold

Twenty-four-karat gold used for traditional Chinese bangles, chains and pendants. Buyers sourcing this category check weight in taels or grams, plus the fineness stamp and the seller's buy-back terms.

4

Platinum 950 (Pt950)

A 95% platinum alloy, the standard for bridal and engagement settings shown by Hong Kong and overseas manufacturers. Buyers verify the alloy stamp and the rhodium or polished finish before placing orders.

5

GIA / IGI grading report

Independent diamond grading documents covering the 4Cs: carat, colour, clarity and cut. Loose-stone exhibitors at the fair table certificates alongside parcels so buyers can match grades to price.

6

Lab-grown diamond

A diamond produced by CVD or HPHT processes with the same chemical and physical properties as a natural stone. Grown stones now appear in melee parcels, bridal lines and fashion collections, and buyers should ask for the growth method and grading report.

7

Melee diamonds

Small diamonds, typically under 0.2 carat, sold in parcels by sieve size and quality range. Melee sourcing is one of the core reasons jewellers visit Hong Kong, since parcel pricing and consistency matter more than single-stone certificates.

8

Jadeite (fei cui)

The pyroxene jade used in high-value bangles, pendants and beads for Chinese-speaking markets. Value is judged by colour saturation, transparency, texture and the absence of cracks, and buyers usually inspect stones in hand under daylight lamps.

9

Pearl types: South Sea, Akoya and freshwater

Pearl categories distinguished by the oyster species and growing water. South Sea pearls are the largest, Akoya offer high lustre in smaller sizes and freshwater pearls give volume at accessible prices. Grading focuses on lustre, nacre thickness, shape and surface.

10

Brilliant cut

The round cut with 57 or 58 facets developed for maximum light return. Most diamond solitaires and melee parcels at the fair use brilliant or modified brilliant cuts, and cut grade is one of the four grading criteria.

11

Pave setting

A setting where many small stones are set close together with minimal visible metal, giving a continuous surface of sparkle. It is a common technique in the diamond bands, hoops and pendants shown by contract manufacturers.

12

Lost-wax casting

A production method where a wax model is invested in plaster and replaced by molten metal. Many Hong Kong exhibitors offer casting as an outsourced service alongside CAD modelling, filing, polishing and setting.

13

Rhodium plating

A thin electroplated rhodium layer applied over white gold or platinum to give a bright white finish. Buyers placing repeat orders ask about plating thickness and re-plating guidance because wear affects colour over time.

14

Hallmark / assay mark

An official stamp confirming precious-metal fineness, applied under the assay rules of the country of sale. Exporters at the fair plan hallmarks per destination market, so buyers should confirm which mark their retail channel requires.

15

OEM and ODM

Original Equipment Manufacturing means producing to a buyer's design; Original Design Manufacturing means the factory supplies the design. Hong Kong exhibitors typically quote both routes, with separate minimums and tooling charges.

16

MOQ (minimum order quantity)

The smallest order a manufacturer will accept, often stated per design, per size or per metal. MOQs at the show vary widely between stock-programme suppliers and bespoke contract workshops and are negotiated per enquiry.