How All Carats Works

Your complete guide to buying and selling certified diamonds on our B2B auction platform. Whether you're a buyer or seller, we've made the process simple, transparent, and secure.

How to Buy Diamonds

Simple steps to start bidding on certified diamonds

1
Register

Create your free buyer account with your business details. Quick verification process.

2
Browse Auctions

Explore live auctions with detailed diamond specs, images, videos, and certifications.

3
Place Bids

Bid manually or set auto-bids to compete automatically up to your maximum.

4
Win & Buy

Win the auction and complete the transaction directly with the verified supplier.

Buyer Features

Auto-Bidding

Set your maximum bid and let the system compete for you automatically. Never miss a winning opportunity.

Watchlist

Save diamonds you're interested in to your watchlist for easy tracking and quick access.

Negotiation

If your bid is below the reserve, negotiate directly with the seller for the best price.

How to Sell Diamonds

Simple steps to list and sell your certified diamonds

1
Register

Create your free supplier account. Complete verification to start listing.

2
List Diamonds

Upload diamond details, images, videos, and certification. Set your prices.

3
Receive Bids

Watch as verified buyers compete for your diamonds during live auctions.

4
Close Sale

Accept winning bids or negotiate with highest bidders. Complete the sale.

Seller Features

Price Control

Set your starting price and selling price. You control when to accept or negotiate.

Bulk Upload

Import multiple diamonds at once via Excel spreadsheet. Save time on listings.

Real-Time Alerts

Instant notifications on new bids, auction results, and buyer messages.

Frequently Asked Questions

Common questions about our diamond auction platform

Yes, registration is completely free for both buyers and sellers. There are no upfront costs to join All Carats.

Auto-bidding (pre-bid) allows you to set a maximum bid amount. The system will automatically bid on your behalf in increments to keep you as the highest bidder, up to your maximum amount.

If the highest bid is below the seller's selling price, a post-auction negotiation period begins. The seller can accept your bid, make a counter-offer, or decline. You can also update your offer during negotiation.

Each listing includes certification details provided by the supplier. Common certifications include GIA, IGI, HRD, and other recognized labs. Always review the certification information before bidding.

No, all bids are binding. Once you place a bid, you are committed to purchase the item at that price if you are the winning bidder. Please bid carefully.

Ready to Get Started?

Join All Carats today and start trading diamonds

Register Now Browse Auctions