Montana Moss Agate 8-10.5mm marquise beads (ETB00194)
Montana Moss Agate
Moss agate (also called mocha stone) is a semi-precious gemstone formed from silicon dioxide. It is a form of chalcedony which includes minerals of a green colour embedded in the stone, forming filaments and other patterns suggestive of moss. It also sometimes resembles blue-cheese.
The field is a clear or milky-white quartz, and the included minerals are mainly oxides of manganese or iron. It is not a true form of agate, as it lacks agate's defining feature of concentric banding. Moss agate is of the white variety with green inclusions that resemble moss. It occurs in many locations.
Dimensions of beads:
Size: 9 x 18.5 x 4 mm
- this is only an approximate, the size varies slightly.
Length: 16 inches