Pyrite 5mm Square Irregular Heishi - 15-16 Inch R0257 it is a gray or

it is a gray or brown mineral with a pearly luster

Please be aware that K2 is sold untreated

It is one of the world’s oldest known stones

It is a phyllosilicate composed of silicon

Calcite is a rock-forming mineral that is extremely common and found throughout the world in sedimentary

Pyrite 5mm Square Irregular Heishi - 15-16 Inch R0257 it is a gray orPyrite, an iron sulfide, is characterized by its metallic luster and brass to yellow hue that have earned it the nickname fools gold. Pyrite is actually lighter in color than gold as well as harder and more brittle. It derives its real name from the Greek pyrites, meaning of fire, as it creates sparks when struck on steel. It is found around the world in many unusual natural formations including globes, cubes, flat radial disks and dodecahedral