A Specialist Auction House - 47th Street, New York

Fancy colors, estate and vintage cuts, unusual makes, and stones with documented provenance. Extremely curated in quality and in what we bring to market.

Sold at auction

Fully digital

Browse anywhere

View every lot online - detailed grading reports, high resolution images & videos - from anywhere in the world.

Bid in real time

Anonymous, competitive bidding that runs on a fixed schedule. No phone calls, no back-and-forth.

Close with confidence

Winning bids are confirmed instantly. Transactions are transparent, traceable, and secure end to end.

Hands-on approach

In-house from start to finish.

Every diamond listed is carefully selected, verified, graded, professionally photographed, and securely held by Forty7 allowing you to bid with complete confidence.

Unlike traditional auction houses, we don't require diamonds to be held for extended periods before auction. Our goal is to streamline the time between consignment and payment, all while offering highly competitive commission fees.

Founder · Nirvam Shah

Second generation, fifteen years in.

Nirvam Shah is a second-generation diamond expert with over 15 years of experience in manufacturing and wholesale distribution. Beginning his career in Belgium, he mastered the intricacies of sourcing, cutting, and trading before expanding into the U.S. market.

Recognizing the need for a more transparent and efficient way to trade diamonds, he founded Forty7, a platform designed to modernize auctions and serve as a valuable tool for the industry.

Why Forty7

Built for the distinctive

Fancy colors, old cuts, estate pieces, exceptional makes - where value is subjective and commodity platforms fall short

Motivated sellers, real reserves

Every lot enters with a reserve set to move. Buyers bid knowing there is genuine value on the table, not a fishing exercise.

Curated, always

Not everything makes it onto Forty7. Every stone is reviewed and accepted based on quality, character, and rarity. Curation is the product.

How it works

Stones are sourced and vetted

Each lot is reviewed and accepted based on quality, rarity, and suitability. Specialist notes accompany every stone.

Registered buyers preview and bid

Access the full catalog online before bidding opens. Bid anonymously on any lot, from anywhere, on any device.

Stones close at true value

Winning bids reflect genuine demand. Sellers receive real offers. Buyers receive stones worth having.

Explore our How It Works page to learn more.

"Finally, an auction platform built for exceptional diamonds."

Verified buyer — New York

Forty7 is the modern auction house for remarkable stones. Subscribe below for early access to upcoming auctions, exceptional discoveries, and market insights.