This Specimen has been sold.
4.3" Wide Polished Prehnite Slab - Australia
This is a 4.3" wide polished prehnite slab, collected from Wave Hill, Australia. This specimen comes with an acrylic display stand.
Prehnite is a calcium aluminum silicate with the chemical composition Ca2Al(AlSi3O10)(OH)2. It generally occurs as volcanic cavity infillings, and typically is a shade between yellow and green, however colorless and blue specimens are not unheard of.