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The Vintage Vault

Edwardian 7.57ct Old Mine Cut Diamond Solitaire Ring in Platinum, c.1905 – GIA Certified, Taylor Swift Style

Edwardian 7.57ct Old Mine Cut Diamond Solitaire Ring in Platinum, c.1905 – GIA Certified, Taylor Swift Style

$58,200.00 USD
$58,200.00 USD
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Experience the height of Edwardian sophistication with this breathtaking antique solitaire ring, a rare treasure from circa 1915. At its heart glows a monumental 7.57 carat Old Mine Cut diamond—an antique cushion cut with fiery brilliance that catches every eye across the room. Masterfully restored, the original platinum setting radiates airy elegance and strength, encapsulating the ethereal craftsmanship emblematic of Edwardian jewelry and prized by collectors and modern luminaries like Taylor Swift.

Design & Details

  • Era: Edwardian, c.1905 – Showcases ornate, lace-like platinum work, airy filigree, and timeless decorative details.

Diamond:

  • Weight: 7.57ct (GIA #6237113648, inscribed)
  • Measurements: 12.27 x 11.67 x 7.43 mm
  • Shape/Cut: Antique cushion (Old Mine Cut), renowned for its lively fire and unique faceting
  • Color: N
  • Clarity: I2
  • GIA certified—natural diamond, authenticity, and quality confirmed

Setting:

  • Solid platinum band (marked “PLAT”), 12.1 mm at the widest and tapering to 1.6 mm for grace and comfort
  • Stands 7.8 mm tall on the finger, creating an impressive, showstopping silhouette
  • Freshly rebuilt vintage prongs; diamond repolished by master cutter Maarten deWitte
  • Weight: 6 grams
  • Size: US 6.5
  • Condition: Pristine and ready for modern admiration—professionally cleaned and expertly reset


Link for GIA Laboratory Report.

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If you have specific delivery needs or timing requests, please contact us. While we strive to ensure timely delivery, we cannot guarantee dates and are not responsible for carrier delays.

Made-to-Order Items
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
These unique items are typically ready for pickup or delivery within 24 hours during business hours (Thu–Sat 11–5, Sun 12–5). You’ll receive an email when your order is ready. Please allow up to 2 weeks for resizing prior to shipment.
Local Pickup
Available at our Downtown Mystic Showroom Thursday–Sunday. We’ll email you to schedule your pickup appointment once your order is ready.
Shipping
Once your item is ready, you’ll receive an email with shipping details.
Orders over $1,000 ship via FedEx with adult signature required. Orders over $5,000 must be picked up with valid ID per insurance requirements. We do not ship to PO boxes for orders over $1,000.
All items are fully insured; however, transit times are not guaranteed.
International Orders
Shipped via FedEx or DHL. Buyer is responsible for any applicable taxes and tariffs.
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 like 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 Petra Star signature pieces are made-to-order using recycled alloys. Custom items are available in the following materials:
* 14k Yellow, Rose & White Gold
* 18k Yellow, Rose & 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.
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. 
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.