Eudialyte 8mm Round - 15-16 Inch 13x40mm Azurite in crystal form is

Azurite in crystal form is extremely rare and expensive

as well as some occurrences of dark gray

It's a beautiful specimen

The shell is often found naturally polished with a green or brown spiral on one side and a white "eye" on the other

Diamond is a rare

Eudialyte 8mm Round - 15-16 Inch 13x40mm Azurite in crystal form isEudialyte is a complex silicate mineral that most commonly forms in granular patterns. It is usually found within coarse grained rocks and contains calcium, cerium, sodium, iron, manganese, zirconium, and yttrium. This stone ranges in color from pink and red to brown, violet, and even green; sometimes with inclusions of Black Tourmaline. It was first discovered in Greenland by F. Stromeyer in 1819 and was named after the Greek words eu dialytos