1.77ct GIA Old European Diamond Platinum Ring | Tapered Baguettes | Petra Star Vintage Vault

Before the modern brilliant transformed fine jewelry, the Old European cut reigned — its deep pavilion, small table, and hand-faceted geometry engineered not for fluorescent precision, but for the warm, romantic fire of gaslight and candlelight. This extraordinary 1.77-carat example, GIA-certified (Report No. 6214215930), carries that legacy in every facet.

At M color, this stone wears its warmth with intention. Old European cuts were never conceived for icy colorlessness — they were cut to glow, and in person, the amber-gold undertones of this diamond ignite with a depth that modern stones rarely achieve. Paired with a beautifully restored mid-century mounting — most likely earlier than the 1950's— the result is a ring that feels less like an acquisition and more like an inheritance.

The setting bears the hallmark 10% IRID PLAT — a period designation for iridio-platinum, an alloy of platinum and 10% iridium prized by fine jewelers through the mid-20th century for its exceptional hardness and resistance to wear. This is not costume platinum. This is the platinum of Cartier's golden era, of Van Cleef's early ateliers — dense, substantial, built to outlast everything.

Flanking the center stone are two tapered baguettes, their geometric precision a hallmark of mid-century design sensibility — architectural, refined, and utterly of their moment.

Diamond Specs
Cut: Old European
Weight: 1 = 1.77 cts Exact
Color: M
Clarity: I1
Measurements: 7.77 x 7.88 x 4.64 mm
GIA Report No. 6214215930

Cut: Tapered Baguettes
Weight: 2 = 0.14 cts Exact
Color: H/I
Clarity: VS2/SI1
Measurements: 4 x 1.7 x 1.3 mm

Dimensions: 7.8 - 1.4 mm wide / 8.1 mm high off finger
Finger Size: 7.25 (inquiring about sizing)
Metal: Platinum
Markings: 10% IRID PLAT
Weight: 3.9 grams
Circa: 1950‘s or earlier