Tiffany & Co.

Tiffany & Co. was founded on September 18, 1837, in Brooklyn, Connecticut, by Charles Lewis Tiffany and John B. Young as a small stationery and fancy-goods shop. Within two decades the business had shifted entirely to jewelry and silverware, renaming itself Tiffany & Company in 1853 and quickly becoming known for an unusual promise for the era: fixed pricing and no haggling, a policy that built the trust the maison still trades on today.

In 1886, Charles Tiffany introduced what would become the house's most influential design: the Tiffany Setting, a six-prong mounting that lifts a diamond above the band to expose it to maximum light. It remains the reference point for the modern solitaire engagement ring and the reason "the Tiffany Setting" is still used generically across the industry. In 1998, Tiffany trademarked its signature robin's-egg color as "Tiffany Blue," later standardized with Pantone as 1837 Blue in honor of the founding year—the little blue box is now as recognized as any logo in luxury.

Today the maison is headquartered at 727 Fifth Avenue in New York, produces prestige commissions from the Vince Lombardi Trophy to the Larry O'Brien Championship Trophy, and since 2021 has been part of the LVMH group. Its design language stays deliberately American and optimistic where European maisons lean on aristocratic heritage: clean geometry, wearable proportions, and a recurring language of love, connection, and everyday luxury across sterling silver, 18k gold, and platinum.

Genuine Tiffany pieces carry a metal-purity stamp (925 sterling silver / 750 18k gold / PT950 platinum) and the brand mark, but beyond that, hallmarking is far less standardized than most luxury houses: engraving style differs by manufacturing workshop, country, and era, so a stamp that looks "off" to an outsider is often still genuine.

A correct-looking receipt or a plausible ring size on paper doesn't guarantee the piece in hand matches it — cross-checking the physical item against its own paperwork catches swaps a stamp alone would miss.

With no warranty card, no serial number on most pieces, and normal variation even in genuine engraving wording, what an outsider flags as "off" (a missing country-of-manufacture stamp, mixed-case carat markings) is often just ordinary variation seen on genuine pieces too — while, conversely, a plausible-looking receipt or stamp can still hide a swapped stone or the wrong size. Reliable authentication only comes from experience handling enough genuine pieces across regions and eras — and that's the archive ONE OF ONE has built case by case.