Aquatine Calcite Polished Point Tiger's Eye but a group of minerals

but a group of minerals with similar crystal structures

Amethyst is a purple variety of quartz that derives its color from irradiation and the presence of iron inclusions within the crystal lattice

4 inch in width

also known as Specularite

Aquatine Calcite Polished Point Tiger's Eye but a group of mineralsBy trade name only, this "onyx" is actually calcite since is fizzes with hydrochloric acid solution. The rock industry leaves the naming to the miners and lapidary shops who classify most calcites with with waves and lines as "onyx". We know, a little confusing. Onyx on the other hand is basically micro quartz and will not fizz in an acid solution. Blue calcite from Brazil is also called Aquatine Calcite Regardless of its name, this is a gorgeous