Unheated 3.70ct Ceylon Sapphire Georgian Inspired Three-Stone Ring | Petra Star
Unheated 3.70ct Ceylon Sapphire Georgian Inspired Three-Stone Ring | Petra Star
By Petra Star
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Some gemstones carry history. This one carries centuries of it.
At the heart of this Georgian-inspired three-stone ring rests a 3.70-carat antique cushion-cut sapphire of Sri Lankan origin — and not just any sapphire. Recently submitted to GIA Laboratory, it returned with a result that stops collectors in their tracks: unheated. In today's market, where the vast majority of sapphires are routinely heat-treated to enhance color and clarity, an unheated Ceylon sapphire of this size is a genuine rarity. GIA Laboratory Report No. 6234347881 confirms what the eye already suspects — this stone is exactly as nature intended.
What Makes a Sri Lankan Sapphire Exceptional
Ceylon sapphires have been treasured for over 2,000 years and remain among the most coveted gemstone origins in the world. Their legendary status comes from the low-iron geology of Sri Lanka's alluvial deposits, which produces a characteristic cornflower-to-velvety-blue saturation with extraordinary transparency — that coveted "lit from within" luminosity. Unheated stones of this caliber command significant premiums at auction, and fine examples increasingly appear in major estate and collector sales. Some of the world's most celebrated sapphires — including the stone in Princess Diana's engagement ring — are Sri Lankan.
Metal: 18k black rhodium white gold & 18k yellow gold
Finger Size: 5.75
Gemstone: Earth mined
Cut: Antique cushion cut formerly Ceylon origin
Weight: 3.70 ct
Color: Violetish Blue / GemGuide Grading: 7.5PB 3/10 #7
Clarity: Eye clean
Measurements: 8.58 x 7.28 x 6.16 mm
GIA Laboratory No. 6234347881
Diamonds: 2 = J/K SI1-3
This is not a ring you encounter often. Unheated Ceylon sapphires of this size, with documented GIA certification and Edwardian provenance, are the stones serious collectors acquire once and keep forever.
Part of the Petra Star Vintage Vault Collection — Mystic, CT
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Made-to-order pieces take approximately 4–6 weeks to craft. We’ll email you once your item is ready to arrange delivery.
One-of-a-Kind Items
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Sizing
Rings
The majority of our rings are one-of-a-kind. If you would like to order a ring in a specific size, please contact us and we will do our best to accommodate your request.
Helping you find the perfect fit is our priority. There is a flat fee of $60 to size down. The sizing-up cost varies based on width of the ring and the amount of material required.
Keep in mind that finger sizes fluctuate due to factors such as temperature and time of day. Rings with an open space under the mounting, as well as contour bands, may fit differently than fully round rings.
Ring sizings take 3 weeks before they ship.
Our Materials
Our Petra Star signature pieces are made-to-order using recycled alloys. Custom items are available in the following materials:
- 14k yellow, rose, or white gold
- 18k yellow, rose, or white gold
- Palladium
- Platinum
If the item you are considering is not available to purchase in your preferred metal/color, please get in touch with us to discuss your specific request.
Our one-of-a-kind items are only available "as is.” We are happy to discuss the options for remaking a similar piece in a different metal to your specifications—it's one of our specialties.
Depending on the light source and viewing angle, the color of natural gemstones may vary. The depiction of color online and in images may not always accurately reflect the colors that are visible in person. Whenever possible, we recommend viewing the item in person to ascertain its true color.
Custom Designs
Schedule a consultation with our in-house designer and owner of Petra Star, Dimitria. We love getting to know you and pairing the perfect piece to your lifestyle and aesthetic.