Auction
Private Auctions
Bid on Rare
Diamonds & Jewels
GEMMA’s private auction platform offers access to certified rare diamonds, one-of-a-kind pieces, and exclusive collections — available to registered bidders worldwide.
How It Works
Bid With Confidence
Every GEMMA auction is conducted with full transparency, certified provenance, and dedicated support.
Register
Create your GEMMA bidder account. Verification is required before your first bid.
Browse Lots
View the full catalogue with GIA certificates, provenance, and starting bids.
Place Your Bid
Bid live or set a maximum automatic bid. Receive instant notifications.
Win & Collect
Winning bidders are contacted within 24 hours. Secure insured delivery or showroom collection.
Current Lots
Live Auction
Browse and bid on GEMMA’s current auction catalogue. All pieces are GIA certified with full provenance.
Coming Soon
Upcoming Auctions
Register your interest now to receive advance notice and catalogue access before each auction opens.
Secure Bidding
Bank-level SSL encryption on all transactions and personal data.
GIA Certified
Every lot includes a GIA certificate and full provenance documentation.
Insured Delivery
All winning lots are shipped with full insurance and tracking.
Dedicated Support
A GEMMA specialist guides you through every step from registration to collection.
Questions
Auction FAQs
Everything you need to know before you bid. Need help? Call us directly.
Who can bid?
Bidding is open to registered clients worldwide. Verification is required before your first bid.
How do I register?
Click Register to Bid and complete the form. Verification takes up to 24 hours.
Are all pieces certified?
Yes. Every lot includes a GIA or equivalent certificate and full provenance documentation.
What are the buyer's fees?
A buyer's premium applies to all winning bids. Full fee details are in the auction catalogue.
How do I collect my lot?
Choose secure insured international delivery or collection from our Dubai or Hong Kong showroom.