Old-mine cut

Old-mine Cut - (a) An early form of brilliant cut with a nearly square girdle outline.

Old-miner: Abbreviation of old-mine cut.
Opal: An amorphous mineral. In great demand as a gemstone because of its unique display of multiple colors. Mostly found in Australia. October birthstone.

A couple other Cuts became popular over the ages as well: Mazarin Cuts, Old-Mine Cuts and Old European Cut Diamonds. You will still find these today in Antique Jewelry or Vintage Pieces.

Cushion Cut The older form of the brilliant cut, having a girdle outline approaching a square with rounded corners. Essentially an old-mine cut.

During the early 18th century, Brazil, the new center of world diamond production, gave rise to the cushion-shaped old-mine cut (below), a forerunner of the modern brilliant cut having 33 crown and 25 pavilion facets, ...

shapes and motifs which are not associated with engagement rings in modern times: Interlacing hearts and initials, serpents symbolizing eternal love, and various representations of endearment from those particularly sentimental times. Old-mine cut ...

Cushion Cut: A square or rectangular stone that has rounded corners, also called "antique cut". The older form of the brilliant cut, having a girdle outline approaching a square with rounded corners. Essentially an "old-mine cut".

See also: Gemstone, Mine cut, Diamond, Jewel, Cut