Aquatine Calcite Polished Point Tiger's Eye Scolecite has a vitreous to

Scolecite has a vitreous to pearly luster depending on the specific crystal surface

also known as Specularite

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

but a group of minerals with similar crystal structures

Originally valued at $25

Aquatine Calcite Polished Point Tiger's Eye Scolecite has a vitreous toBy 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