Polished Specularite Slab - Michigan with the largest being 377

with the largest being 377 by 299 ft

Vanadinite typically forms in arid climates alongside other lead-based minerals

and even black

This specimen is actually a unique formation of purple amethyst that can also contain hues of blue

and sometimes realgar (orange)

Polished Specularite Slab - Michigan with the largest being 377Specularite, also known as specular hematite, is a variety of hematite that is identified by microscopic flakes of hematite and mica that imitate a mirror. This mineral can be found all over the world including Canada, Italy, Brazil, Sweden, and the United States. This slab has been coated with a thin layer of epoxy to help stabilize the specimen and give it a clean appearance. Hematite is an iron oxide found virtually everywhere on Earth. This