Demystifying Old Cut Diamonds
"Wait—why isn't this diamond round?"
Before diamond cutting became a science of angles and light-return percentages, it was a craft practiced by candlelight, by hand, with tools a modern cutter would consider primitive. Every “flaw” you notice in an antique cut—the soft asymmetry, the open culet, the facets that don't quite line up—is a fingerprint left by the person who cut it, sometime between the 1700s and the 1930s. If you've read our post on buying jewelry online, this'll sound familiar: antique stones aren't trying to be modern round brilliants. They're succeeding at being something else entirely.
Three cuts come up more than any others when people ask us about “old” diamonds. Here's what actually separates them.
Old Mine Cut
The oldest of the two faceted-pavilion cuts on this list—the rose cut, which has no pavilion, is actually older, but we'll get to that in a bit. Old Mine cuts were worked roughly from the 1700s through the late 1800s, before electric light existed anywhere. The outline is squarish—a cushion shape, but an organic, slightly lopsided one, never quite the same twice. Pair that with a high crown, a small table, and a big, flat culet (sometimes visible as a tiny window if you look straight down through the stone), and you get a cut built for candlelight and gaslight: broad, warm flashes rather than the tight fire a modern brilliant throws under bright indoor lighting.
Old European Cut
Sometime around the 1890s–1900s, cutters started rounding out the Old Mine's cushion silhouette—shrinking the culet, tightening the facets—as saws and bruting machines got better. What resulted is the Old European Cut: rounder than its predecessor, but still noticeably not what you'd get from a laser-guided modern cutter. It's the direct ancestor of today's round brilliant. In 1919, a mathematician named Marcel Tolkowsky published the ideal proportions for maximizing a diamond's brilliance and fire—those proportions served as the foundation for the modern round brilliant. Everything before that, cut by eye and experience rather than by equation, is what we call an “old cut.” Old Europeans kept the high crown, small table, and big culet of the Old Mine, and they were cut clear through the Victorian era into Art Deco, so the settings you'll find them in vary enormously.
Rose Cut
If Old Mine and Old European are variations on a faceted pavilion, rose cut is a different animal entirely—there is no pavilion. A rose cut diamond is flat on the bottom and domed on top, with anywhere from three to twenty-four triangular facets rising to a point, like the petals of an unopened rose bud (hence the name). It's the oldest cutting style of the three by far, dating back to sixteenth- and seventeenth-century Europe, well before anyone thought to facet a pavilion at all.
With no pavilion to bounce light back up through the table, a rose cut doesn't throw the fire and brilliance of a modern round. What it gives you instead is a softer, more contemplative glow—more glimmer than sparkle. That's not a compromise. Rose cuts were never trying to compete with a brilliant cut; they were built to catch candlelight in a completely different way.
Want to see two side by side? One of our favorite pieces to pass through the shop paired an Old European and a rose cut in the same antique setting—proof these two very different personalities were sometimes designed to share a ring.
So which one is right for you?
None of these are “better” than a modern round brilliant—they're different items built for different eras and different kinds of sparkle. If you love the fire of a laser-cut modern diamond, that's a wonderful choice. But if you're drawn to something with more history and personality than uniformity, an antique cut might be exactly what you're looking for!
Browse our Antique Cut Diamonds collection, or stop by the shop in Nashville—we love talking about this stuff!