caused by internal fractures in the mineral that reflect light back and forth

This basaltic achondrite eucrite classified meteorite was found in the Sahara Desert in 2005 and is 1 of 616 approved meteorites classified as such

It is a durable gemstone with a hardness of 8 on the Mohs scale making it suitable for everyday wear in jewelry

Tucson Mountain District Saguaro National Park

This is a strand of black and white Snowflake Obsidian beads with an overall length of 43 cm (17 inches)

Conichalcite | 34 Grams | Gold Hill Mine, Tooele Co. | Utah, USA L6 caused by internal fractures inThis is a botryoidal growth of dark green Conichalcite on matrix. This piece originates from the 40' Level of the historic Gold Hill Mine in Tooele County, Utah, a locality long recognized for producing a wide variety of copper and arsenate minerals. Although the district was once highly productive, specimens from the classic workings have become increasingly difficult to obtain since the mines closure in 1945. Name: Conichalcite Specimen Size: