Cactus Quartz with iridescent Goethite #3

This listing is for 1 Cactus Quartz  with a natural iridescent geothite coating

Locality : South Africa (Boekenhoutshoek, Magaliesberg)

Size approx  :  2"  x  2"     (124g)

Common Localities: South Africa, Madagascar, Australia

Composition: Silicon dioxide [SiO2] with coating of Goethite [FeO(OH)] and minor inclusions of iron [Fe] and Aluminum [Al] and other minerals

This quartz is named for its resemblance to a cactus, with its radiating crystal points covering the surface of a larger quartz crystal. Cactus Quartz is typically found in shades of purple, pink, and white. This particular Cactus Quartz specimen is coated with goethite, which creates a beautiful golden-brown hue. Additionally, the specimen displays natural iridescence, which is a result of the crystal's surface refracting light in a way that creates a rainbow effect.