Blue and purple banded fluorite that has been carved into a sea turtle. There is a nice textural contrast between the body and the shell.
Measurements: ~3-1/4" long x 2-1/4" wide x 1" tall
Fluorite forms in a variety of colors and is either transparent to translucent. The chemical composition of Fluorite is CaF2, (calcium & fluorine.) The variation in colors are due to trace amounts of other elements replacing the calcium during the crystalline formation. Fluorite is actually fluorescent and will glow when illuminated with an ultraviolet light source.
Fluorite is mined for a variety of industrial uses, however although it is an exceptionally beautiful mineral and is used to a degree in lapidary uses, it is not commonly used as a semi-precious stone, due to its softness and fragility.
Unfortunately Covid is again on the rise, in Evanston.
Although not mandatory, masks are highly recommended.