Labradorite Natural 6mm Round Matte A Grade - 15-16 Inch 20210810 They are all varieties of

They are all varieties of the mineral corundum

Black Silverleaf Jasper is a rare form of Jasper

It is a member of the Quartz family

Australian Butter Jasper is a relatively new variation of Jasper that definitely meets that criteria

Labradorite Natural 6mm Round Matte A Grade - 15-16 Inch 20210810 They are all varieties ofLabradorite is remarkable for the way its aggregate layers refract light, creating iridescent flashes of blue, gold, pale green or copper red. This effect is known as labradorescence, taking its name from the stone. Labradorite is usually gray to green, dark gray, light gray or black. It was discovered in Labrador, Canada in 1770 and named for the area, though it is referenced as a highly revered stone in much older Inuit tribal legends.