EPIDOTE CRYSTAL STACK SPECIMEN
An outstanding Epidote Crystal Stack Specimen. Hard to come by with some well defined hexagonal Epidote Crystal formation. This material is weakly magnetic. There is a neo magnet showing attractive force. My photos do no justice to this specimen as it looks much better in person.
Zard Mountains, Kharan, Balochistan, Pakistan.
7.1cm x 6.6cm x 5.8cm, 308g.
Calcium Aluminum Iron Silicate Hydroxide
Epidote is a structurally complex mineral having both single silicate tetrahedrons, SiO4, and double silicate tetrahedrons, Si2O7. The two Aluminums represent the parallel chains of AlO6 and AlO4(OH)2 Octahedra that are the heart of the Epidote structure. The silicate groups and extra ions connect the chains together. Since the chains are parallel, the crystals tend to be prismatic. Epidote, while not general known for exceptional crystals can produce some magnificent specimens.