Black Spinel 9x13mm Twisted Drop - 8 Inch 48hr_01162023 Chiastolite is also known as

Chiastolite is also known as the Cross Stone for the cross matrices of browns

whose color often caused ancient jewelers to confuse it with Emerald

it is a form of hydrated amorphous silica

black with snowflake patterns

Some specimens of Fire Opal produce iridescent flashes and are referred to as Precious Fire Opal or “Firmament Stone

Black Spinel 9x13mm Twisted Drop - 8 Inch 48hr_01162023 Chiastolite is also known asSpinel is a hard vitreous magnesium aluminum oxide, and comes in a range of other colors, but those varieties are transparent. Black Spinel not only has the dark color, but it is opaque as well, rendering its black especially deep and mysterious. Sometimes called the "Black Prince's Ruby" for its role in the English crown. It has been mistaken for ruby and sapphire at times, but can be distinguished by its structure and its lower relative hardness.