This is a beautiful Prehnite piece from Xoboxobos, Brandberg District, Namibia
Crystal Dimensions: 4cm (1.5”) x 3cm (1.1”)
Crystal Weight: 30 grams
Prehnite is a pale yellow-green stone made primarily of calcium and aluminum.
Some forms have iron in them as well, which causes a darker orange-yellow colour, but the majority are quite pale and milky, not at all see-through.
The chemical formula is: