CARBON SIX DIAMONDS INC

Diamond dealing in Manhattan still happens the old-fashioned way: face to face, in a building you can point to on a map. CARBON SIX DIAMONDS INC keeps an office at 15 W 47th St #1303A, a street where the sidewalks hum with the quiet commerce of polished stones and handshakes. The address places it squarely in the city’s historic diamond district, where the trade has been concentrated for generations.

Dealers here handle everything from loose stones to custom settings, and the category tends to attract buyers who prefer to see what they’re paying for before the transaction is final. A call ahead to (212) 655-3090 can save a walk-in some time, especially if the visit is tied to a specific purchase or appraisal. The neighborhood itself is a mix of narrow storefronts and towering office buildings, where the pace is brisk but the interactions remain personal.

For anyone navigating the district, the map at this link will drop a pin on the exact suite. The area around 47th Street doesn’t slow down until well after dark, so the timing of a visit is more about the buyer’s schedule than the dealer’s. Sidewalks stay crowded, but the real traffic is the steady flow of people who know exactly what they’re after.