Onyx 12mm Square 8-Inch birthstone_sapphire occasionally mingled with rust-brown

occasionally mingled with rust-brown

and is a result of trace amounts of copper or chromium

and chromium lends a beautiful pink or purple

all organic parts are replaced by minerals

Onyx 12mm Square 8-Inch birthstone_sapphire occasionally mingled with rust-brownOnyx is a black and white banded Chalcedony, a cryptocrystalline Quartz. It is often thought of as an all black stone, and much of the black Onyx on the market has been artificially colored. Onyx has been both revered and feared throughout history. It is referenced in many sacred texts and historical manuscripts and is the first precious stone mentioned in the Bible. However in some regions, such as China, it was feared for centuries as a bad luck