Direct from Bangkok's Diamond District. Since 1987.
No Middlemen. No Markups. Transparent Wholesale Pricing.
Send Your RequirementsThe Source, Not the Middleman
Jay Gems has been supplying loose diamonds from Bangkok since 1987. We sit inside the supply chain, not outside it, which means the prices you pay with us reflect direct access rather than layers of margin added by brokers and intermediaries.
We supply jewellery manufacturers, wholesalers, retailers and private label brands across Bangkok and globally. Whether you need a single certified stone for a bespoke piece or a parcel of melee for production, we can help.
Tell us what you are looking for and we will come back with options, pricing and availability. There is no obligation and no pressure.
Loose Diamonds for Every Requirement
◆From single stones to large commercial parcels, we source whatever you need.
The world's most popular diamond shape. Available in all sizes from 0.01ct melee to 10ct+ single stones, across the full colour and clarity spectrum.
Oval, cushion, pear, emerald, princess, marquise, radiant, Asscher and heart. We source any shape from our global network with consistent quality.
Matched melee for pave, channel and halo settings. Supplied by size, colour and clarity to your production specification. Single lots or ongoing supply.
Commercial parcels in mixed or matched grades. Ideal for manufacturers and wholesalers needing volume at competitive prices with consistent stone quality.
Need a specific shape, size, colour and clarity combination? Send us the spec and we will search our network to find what you are looking for.
Yellow, pink, blue, green and other natural fancy colour diamonds sourced to specification. Certified and non-certified goods available.
What We Can Source
◆We supply across the full range of commercially available grades. If you have a specific requirement not listed, ask us.
D through Z colourless to light yellow. Coloured goods available on request.
Flawless through I3. We advise on the best clarity for your intended use and budget.
International Certifications
◆We supply certified diamonds from all three major international grading laboratories. Non-certified goods are also available at more competitive price points.
The world's most trusted diamond grading authority. GIA reports are the global standard for high-value stone transactions and are recognised by buyers and sellers worldwide.
The world's largest independent gemological laboratory. IGI reports are widely used across Asia and are particularly common for lab-grown diamonds and mid-range commercial goods.
Belgium's premier diamond grading institute, widely recognised across European markets. HRD certified stones are particularly sought after by European buyers and retailers.
Non-certified goods are also available at more competitive price points. We advise on whether certification is necessary for your intended use.