Taylor Swift’s Engagement Ring: What Is an Old Mine Cut Diamond?
Old mine cut engagement rings are rare and historically significant, valuable for both their warm glow and individuality. Perfect for Taylor Swift? We think so. Old mine cut diamonds are connected to the past and have a unique character that no oval or fancy cut can compete with. Here’s everything you should know about them as Swifties scramble to learn more about their rich heritage.
What is an old mine cut diamond?
An old mine cut is a diamond shape popular from the early 1700s through the late 1800s, before the modern brilliant cut was invented, according to Estate Diamond Jewelry. You can recognize an old mine cut diamond due to its:
- Cushion-shaped outline (rounded square)
- High crown and small table
- Large, open culet (flat facet at the bottom)
- Chunkier facets that create a softer, candlelit glow rather than the sharp sparkle of modern cuts
Old mine cut diamond engagement rings tend to have an antique, romantic feel. They have less “blinding” brilliance but more warmth and depth.
The history of Taylor Swift’s diamond of choice
Old mine cuts emerged during the Georgian and Victorian eras of the 1700s and 1800s. They were hand-cut, typically by candlelight, to maximize sparkle in low-light settings. Many were cut from diamonds mined in Brazil (before African mines were discovered in the late 1800s) and later from South Africa. By the early 20th century, old mine cuts gave way to the old European cut (rounder, with more precision) as diamond-cutting technology improved.
How rare are old mine cut diamonds?
True old mine cut diamonds are rare today since they were cut by hand centuries ago. Many were re-cut into modern brilliant diamonds in the 20th century, reducing the number of original stones still in circulation. Now, collectors and vintage jewelry buyers actively seek them, especially when set in original antique mountings, like Victorian, Georgian, and Edwardian.
The worth and value of Taylor Swift’s old mine cut diamond
Old mine cut diamonds can be priced comparably or sometimes higher than modern diamonds of similar size and quality because of their rarity and historic value. Several factors influence price:
- Carat weight: Larger old mine cuts are especially rare and valuable.
- Cut quality: Since they were hand-cut, symmetry varies. Some buyers prize the quirks, while others value well-proportioned stones more.
- Color: Many old mine cuts are warmer in tone (K–M color grades are common). Some buyers love this antique warmth; others prefer whiter stones.
- Setting: Diamonds in original period settings, like Victorian filigree, Georgian closed-back, and Edwardian platinum, are more valuable.
The jewelry and diamond experts at the retailer Steven Stone weighed in on Taylor Swift’s stunning sparkler. Zack Stone told Showbiz Cheat Sheet that her ring looks to be 12 carats, estimated to be worth at least $700,000. Other diamond experts place the worth closer to $1-$1.2 million.
Old mine cut engagement rings have a fascinating history and remain highly sought after by collectors, antique jewelry lovers, and couples looking for something unique.
What to consider if you want an old mine cut diamond engagement ring
These unique diamonds have a softer, more romantic sparkle than modern diamonds. Many couples choose this gemstone due to its connection to history. Others find meaning in the imperfections and asymmetry that give them a distinct charm. Consider these factors when choosing the right diamond for you:
- Durability: Being diamonds, they’re durable, but you may need to reinforce an older setting.
- Certification: Some old mine cuts may not fit modern grading standards perfectly. Make sure to seek reputable antique dealers.
- Modern popularity: Old mine cut diamond engagement rings are surging in popularity thanks to celebrities like Natalie Portman and now Taylor Swift sporting them. This may dissuade those who want to go against the grain.
How much does a loose old mine cut diamond cost?
According to Diamond Pro, here are approximate market prices (as of publication) for loose old mine cut diamonds:
- 0.5 to 0.69 ct: $1,800 to $2,000 per carat
- 1.0 to 1.4 ct: $2,700 to $3,300 per carat
- 1.5 to 1.99 ct: $3,300 to $4,100 per carat
- 2.0 to 2.99 ct: $4,500 to $5,800 per carat
These numbers help set expectations: A 1-carat old mine cut diamond often costs around $2,700–$3,300, while larger 2-carat stones command higher per-carat premiums.
