An old diamond cut from a mine recalls the past when diamonds were measured by eye and cut by hand. Therefore, this historic diamond cut is an excellent choice if you are looking for an engagement ring with vintage or antique qualities.
Early diamond cutters (now known as roughs) shaped diamonds cut in ancient mines by following the octahedral shape of the diamond crystal, laboriously grinding two diamonds into the desired shape, then having the facets polished. by a diamond polisher. Due to the shape of the blank and the fact that diamonds are handcrafted, dimensions vary from stone to stone. This has made each old lead-cut diamond unique or, to put it poetically, a personality in its own right.
The proportions of old-cut diamonds are very different from those of modern-cut diamonds. Old cut diamonds have a smaller table, higher crown, and larger facets than modern cut diamonds - 58 facets in all. (Modern brilliant-cut diamonds have 57 to 58 facets.) These larger proportions had a purpose: they were chosen so that the diamonds would sparkle in the candlelight. However, old cut diamonds do not sparkle as brilliantly as modern cut diamonds. Because diamonds from old mines are cut by eye and by hand, each diamond has a unique charm: they often have thick, irregular facets and an asymmetrical shape.
The diamonds are no longer cut in the old-fashioned way, which makes them very rare. Some collectors are willing to pay a considerable amount for diamonds from different eras. However, a diamond's value is also based on its 4 C's (cut, color, carat, and clarity), and many vintage diamonds cut by miners have lower cut qualities than modern diamonds, which can reduce their value. If you own an old mine-cut diamond, the best way to understand its value is to have it appraised.