Vintage 1940s PSCO 10K Gold Black Onyx Diamond Ring Art Deco Size 3, 2.2 grams

Description

View Vintage 1940s PSCO 10K Gold Black Onyx Diamond Ring Art Deco Size 3, 2.2 grams with current marketplace pricing, condition, product images and item details. Diamond is a genuine small accent stone. ➤ Stone(s): Black onyx, approx. ➤ Setting: Bezel-set onyx with pierced scalloped gallery; diamond-shaped prong accent. ➤ Weight: 2.2 grams. And then there is the ring itself. "....She kept her hands folded. Rings like this were made for exactly that pose." By 1940, the Art Deco era was winding down, but its geometry hadn't lost its grip yet — long, elongated ovals, crisp gallery work, a single stone doing the talking instead of a dozen. This ring comes from the Plainville Stock Company, a Massachusetts manufacturer that had been producing jewelry since the 1870s and stamped its work "PSCO" or "P.S.Co." — a mark collectors still hunt for today, though the firm never achieved the household-name status of its Providence and Attleboro neighbors. What survives is the work itself: honest 10k gold, cleanly cut onyx, no shortcuts taken on a piece built for everyday wear rather than display. And then there is the ring itself. A single elongated oval of black onyx runs the length of the finger, bezel-set in yellow gold with a scalloped, pierced gallery framing its edge — small connected loops that catch light around the stone's perimeter rather than competing with it. Set into the onyx's face, slightly above center, a small diamond rests in a white gold diamond-shaped frame with delicate milgrain detail — a bright accent against all that matte black. The shank is simple and unadorned, letting the top do the work, with the hallmark "10K-PSCO" stamped clearly on the interior. Trust & Disclosure: Metal content confirmed by interior stamp: 10K-PSCO, attributed to the Plainville Stock Company of Plainville, Massachusetts. Diamond is a genuine small accent stone. Onyx is natural chalcedony, commonly dyed black per industry standard practice; no additional treatment disclosure beyond that is claimed. Beautiful vintage condition. Please review all photos carefully — photos are part of this description. ➤ Metal: Solid 10k yellow gold with white gold diamond setting, stamped 10K-PSCO ➤ Maker: Plainville Stock Company (Plainville, MA) ➤ Stone(s): Black onyx, approx. 15mm x 7.6mm; single small diamond accent, treatment/grade unconfirmed ➤ Setting: Bezel-set onyx with pierced scalloped gallery; diamond-shaped prong accent ➤ Size: US 3 (resizable at a local jeweler, or worn as a pinky ring) ➤ Weight: 2.2 grams ➤ Era: Art Deco/Retro transitional, c. 1940 ➤ Condition: Beautiful vintage — see all photos Some rings are accessories. This one is a presence. 🛍️ Visit DivaJewelry Gallery for more exquisite vintage & antique finds! ✅ Authentic antique and vintage from U.S. estate 📦 Free U.S. shipping 🔁 Free 30-day returns A timeless piece with vintage charm — ready to wear or gift. Trusted seller — genuine vintage pieces with Your piece will be safely packed and shipped with tracking. Note: This item is pre-owned vintage and may show minor signs of age. Please review photos carefully and feel free to ask questions — I’m happy to help. Condition: Pre-owned - Good. Category: Jewelry & Watches › Vintage & Antique Jewelry › Rings. Brand: PSCO.

Antique

Yes

Number of Diamonds

1

Occasion

Anniversary, Birthday, Christmas, Engagement, Graduation, Mother's Day, Valentine's Day

Main Stone Color

Black

Metal

Yellow Gold

Secondary Stone

Diamond

Jewelry Department

Fine

Main Stone

Onyx

Vintage

Yes

Personalize

No

Ring Size

3

Department

Unisex Adults

Main Stone Shape

Oval

Base Metal

Gold

Style

Cocktail

Number of Gemstones

1

Handmade

No

Main Stone Creation

Natural

Seller Warranty

No

Signed

Yes

Color

Black

Sizable

Yes

Material

Gemstone

Materials sourced from

United States

Brand

PSCO

Setting Style

Prong

Type

Ring

Metal Purity

10k

Customized

No

Era

Retro (1935-1950)

Theme

Art

Original/Reproduction

Original

Wholesale

No

Country of Origin

United States