Chrysocolla 8-10mm Irregular Cube A Grade - 15-16 Inch Color_Green Prehnite is translucent to transparent

Prehnite is translucent to transparent

which may contain iron oxide

When the level of iron oxide is high

In lower grades it can be transparent to opaque and is commonly light blue

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Chrysocolla 8-10mm Irregular Cube A Grade - 15-16 Inch Color_Green Prehnite is translucent to transparentChrysocolla, a hydrous copper silicate, is often mistaken for turquoise due to its rich blues and blue to greens. It often also occurs with colors of rust, copper, black, white and reddish brown in speckles, veins and brecciated patterns. It is a very soft stone typically found near copper deposits. Chrysocolla was first described by Theosphrastus, a Greek philosopher and botanist who also named the stone, in 315 BCE.