The World'sPremier GemMarketplace
Buy, sell, and discover the world's most exquisite gemstones. Verified by gemologists. Secured by trust.
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
Rubies
Sapphires
Emeralds
Amethysts
Pearls
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.”
“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.”
“The authentication process is rigorous — exactly what the market needed. My clients trust every gem I source through Gemi.”
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.
Get notified when we launch