Now Live · The Gem Revolution

The World'sPremier GemMarketplace

Buy, sell, and discover the world's most exquisite gemstones. Verified by gemologists. Secured by trust.

GIA CertifiedSecure Escrow50+ CountriesExpert Verification
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Gems Listed
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Satisfaction

Features

Built for the Gem Industry

From Sri Lankan sapphires to Colombian emeralds — every transaction is trusted, transparent, and secure.

Expert Authentication

Every gem is reviewed by GIA-trained gemologists. Certificates verified on-chain. No fakes, no guessing.

Global Discovery

Reach buyers and sellers across 54 countries. Rare sapphires from Sri Lanka. Colombian emeralds. Burmese rubies.

Secure Escrow

Funds held in escrow until delivery confirmed. Insured shipping. Dispute resolution. Complete peace of mind.

Certificate Tracking

Upload GIA, AGL, or Gübelin certificates. Smart search by carat, cut, clarity, color, and origin.

Categories

Explore by Gemstone

Thousands of authenticated gems across every variety, origin, and price range.

Diamonds
South Africa · Botswana

Diamonds

Browse
Rubies
Burma · Thailand · Mozambique

Rubies

Browse
Sapphires
Sri Lanka · Kashmir · Madagascar

Sapphires

Browse
Emeralds
Colombia · Zambia · Brazil

Emeralds

Browse
Amethysts
Brazil · Uruguay · Zambia

Amethysts

Browse
Pearls
Japan · Australia · Tahiti

Pearls

Browse

How It Works

Simple. Transparent. Trusted.

List Your Gem

Upload high-resolution photos, attach GIA or AGL certificates, and set your price. Our guided listing wizard makes it effortless.

Connect Worldwide

Your listing reaches thousands of verified collectors, dealers, and investors across 54 countries — instantly discoverable.

Sell Securely

Funds held in escrow. Insured, tracked shipping. Payment released only after the buyer confirms receipt and authenticity.

About Us

Trusted by the Industry

Gemi completely changed how I source sapphires. I found a 5-carat Kashmir piece I'd never have discovered otherwise — certificate included, escrow flawless.

AD
Amara Diallo
Master Gemologist, Geneva

As a Colombia-based emerald miner, reaching global buyers was impossible before Gemi. Now I close deals with collectors in Tokyo and New York weekly.

CM
Carlos Murillo
Emerald Miner & Dealer, Bogotá

The authentication process is rigorous — exactly what the market needed. My clients trust every gem I source through Gemi.

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Yuki Nakamura
Fine Jewelry Designer, Tokyo
Coming Soon

Gemi in Your Pocket

The full marketplace experience — anywhere, anytime. iOS and Android apps launching soon with AR gem preview, push notifications, and instant messaging with sellers.

GEMI
Blue Sapphire 3.2ct
$4,200
Burmese Ruby 1.8ct
$8,900

Get notified when we launch