Gemstone Glossary

Marquise cut

Also navette cut, reportedly named after the Marquise de Pompadour

Millenniums cut

See concave cut

Mixed cut

Upper and lower part of the stone are cut in different styles e.g. upper part brilliant or scissors cut, lower part step cut or 3-4 rows of rectangular facets

Mohs hardness

The degree of hardness of minerals according to the scale of hardness published in 1822 by the German mineralogist Friedrich Mohs.

  1. talc
  2. gypsum
  3. calcite
  4. fluorspar
  5. apatite
  6. orthoclase feldspar
  7. quartz
  8. topaz
  9. corundum
  10. diamond