Tanzanite Fluorite

Tanzanite Fluorite

which over the course of millions of years becomes solid while retaining the semitransparent yellowish hue of tree sap

from the Upper Silurian age

Aquamarine is a form of Beryl crystal long sought after as a gem and precious stone due to its beautiful blue-green hue and clarity

but most specimens have vivid color due to various impurities and are often fluorescent

These pieces of cuboidal fluorite crystals in varying shades of dark green occur on a high contrast white-gray matrix

From the Upper Ordovician Period - Ashgill Stage - Ktaoua Formation

These specimens of Mosasaur (Mosasaurus anceps) teeth are embedded in matrix

and is one of the more common gems although pieces of exceptional hue and clarity are considered fairly rare and can be extremely valuable

Fluorite has long been used as a gemstone and is increasingly popular in the market

which means it naturally occurs in its metallic form

Kataoua formation

resulting from the oxidation of its copper and sulfide components