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The term "Old mine cut" refers to cuts that are close to the "cushion" (cushion) or "circle" shape, referring to the wedge-shaped (diamond) type of cuts.
Nowadays in the jewelry industry the name “onyx” is applied to dark, mostly black, varieties of rocks or minerals formed from varieties of silica.
A wide range of stones used in the jewelry industry is subjected to heat treatment.
This type of cut was first used in India, which was the only source of gem-quality diamonds throughout the ancient, antique and medieval periods of history.
Point cut diamond rings are the beginning of the tradition of diamond engagement rings in Europe.
