how to facet
gemstone main cabochon creation
min data

Mineral: quartz
Gem: Montana agate (cryptocrystalline)
Size: 10x14 mm & 10x14 mm
Carat: 3.6 ct & 3.7 ct
Cut: rectangular cabochon(s)
Origin: Montana
General Info: Agate (achates) was named from the river Achates, now the Drillo, in Sicily, where the stone was first identified. It is cryptocrystalline quartz (micro crystals) usually with a banded pattern (although not always).
Additional Information
Montana agate tends to have a very clear base with wispy brown/orange clouds or banding. It may also have dark mossy areas, including plumes or dentrites. It has a relatively distinctive color an patterning that is easy to spot once you have seen it. Cut by author.