Old mine and old European cuts are the antique ancestors of the modern round brilliant. Both have a small table, a high crown, a deep pavilion and an open culet that shows as a small circle through the top. Cutters shaped them by hand and eye for the light of candles and gas lamps, so they show broad, slow flashes of color instead of the fine sparkle of a modern diamond. Collectors value them as original pieces of jewelry history.
The old mine cut
The old mine cut was the standard brilliant from the early 18th century until the late 19th. Its outline is a cushion, a square or rectangle with rounded corners and gently curved sides. Most stones are a little asymmetrical, because cutters worked by hand and tried to save weight from each crystal.
Typical features of an old mine cut:
- Cushion outline, often slightly irregular
- Small table, sometimes well under half the stone's width
- High crown and deep pavilion
- Large open culet, visible face-up as a small circle or octagon
- Short lower girdle facets, which make the pavilion facets look broad and chunky
The name is often linked to the "old mines" of India and Brazil, which supplied rough before South African production began. Brazil became the main source after diamonds were found in Minas Gerais in the 1720s (see diamond mines of Brazil). Old mine cuts appear in Georgian and early to mid Victorian jewelry, often set in silver over gold.
The old European cut
The old European cut took over in the late 19th century and stayed common until the 1930s. It is round, but otherwise keeps many old mine traits: a small table, high crown, deep pavilion and open culet.
Two developments made it possible. South Africa's diamond fields, opened after 1867, sent a large supply of rough to Europe. Mechanical bruting lathes developed in the 1870s let cutters round stones accurately. The old European cut was the result: a symmetrical round that still followed the old proportions. It is the most common diamond cut in late Victorian, Edwardian and Art Nouveau jewelry, and it appears in plenty of early Art Deco pieces too.
Transitional cuts bridged the gap in the 1920s and 1930s. These have a larger table, a smaller culet and longer lower girdle facets, looking partway between an old European and a modern brilliant.
How to identify an antique cut
Looking face-up through a loupe, three features stand out on most old cuts.
- The culet. A modern brilliant comes to a point. An old cut has a flat facet at the bottom that shows as a small dark or clear circle in the center of the stone, sometimes called the "hole."
- The table. Old cuts have small tables and steep, tall crowns. The table can look small in proportion to the crown facets around it.
- The facet pattern. Old cuts have short lower girdle facets and broad pavilion mains. Face-up, the stone shows wide, blocky flashes in a pattern often described as a checkerboard or a flower. Modern brilliants show long, thin, splintery flashes.
Hand-cut girdles are often uneven in thickness and sometimes left rough. Old mine cuts also tend to look less symmetrical than modern stones when viewed from the side.
Why they look different by candlelight
Old cuts concentrate light into fewer, larger flashes, and a high crown with a small table tends to spread white light into color. Under a single small flame, those large facets catch the light and throw broad flashes of orange, blue and green. The stone appears to glow.
Modern brilliants were designed later for electric light. Their longer facets break light into many small, bright points of white and color. Under bright overhead store lighting, a modern brilliant often looks brighter than an old cut. Under candlelight or soft daylight, an old cut can look livelier than its proportions suggest.
The two designs suit different lighting. The diamond optical properties page explains brilliance, dispersion and scintillation in more detail.
Grading old cuts
Labs grade old cuts for color, clarity and carat in the same way as modern diamonds. Grading reports describe them as "old European brilliant" or "old mine brilliant" and list the culet size, often "large" or "very large."
Labs do not give standard cut grades to old European or old mine cuts in the same way they do for modern round brilliants, because the modern scale would mark nearly all of them down. Buyers judge them by eye, symmetry, condition of the girdle and any chips or abrasions.
Many antique diamonds fall in the near-colorless to faint yellow range, partly because the warm tone of candlelight hid faint color and cutters prized weight. Old cuts with high color grades exist but are less common.
The recutting debate
Through much of the 20th century, jewelers routinely recut old diamonds into modern brilliants. A recut stone gained brightness under modern lighting and fit current tastes, but it lost weight, often 10 to 30 percent or more, depending on the original shape.
Opinion has shifted since the late 20th century. Demand for authentic antique diamonds grew, and dealers began to warn against recutting good old stones. Each recut removes one more original from a shrinking supply, and many collectors now pay more for a well-preserved old European cut than for a modern stone of similar weight and grade.
Arguments for recutting usually involve damaged stones. A deep chip, a broken culet or a badly lopsided cut can justify a recut, sometimes into a modern "old style" design that keeps much of the antique look. The decision depends on condition, weight loss and whether the stone sits in an original antique setting. A gemological lab report helps record what the stone is before any work.
Collecting old cuts
Old cut diamonds turn up in estate rings, brooches, earrings and lockets. A few points help when buying:
- Ask whether the stone is original to the setting or added later
- Check the girdle and culet for chips, which are common on antique stones
- Look at the stone in several types of light, including daylight and a warm lamp
- Ask for a lab report on larger stones to confirm natural origin and any treatments
The history of diamond cutting traces how these cuts fit into the path from point cuts to the modern round brilliant.
Frequently asked questions
What is the difference between an old mine cut and an old European cut?
An old mine cut has a cushion outline and dates mostly from the 18th and 19th centuries. An old European cut is round and was common from the late 19th century to the 1930s. Both have small tables, high crowns and open culets.
Are old European cut diamonds worth less than modern diamonds?
Not necessarily. Value depends on color, clarity, carat, condition and demand. Well-preserved antique cuts often attract collector interest that offsets their lack of a modern cut grade.
Should I recut an old mine diamond?
Many dealers advise against it unless the stone is damaged. Recutting loses weight and removes an original antique diamond from circulation.
How can I tell if a diamond is an old cut?
Look for an open culet showing as a small circle in the center, a small table, a tall crown and broad blocky flashes. A jeweler with a loupe can usually confirm it in seconds.