LARGE PREHNITE CLUSTER
A great Indian Large Prehnite Cluster for your collection. This particular specimen has the wonderful pale green green colour and prominent finger formations. The specimen is mounted on a perspex pad for enhanced display. My photos do this specimen no justice and it looks darker green in colour.
Location:
Bombay Quarry, Mumbai District, Maharashtra, India.
Dimensions:
16cm x 14cm x 6cm, 488g.
Prehnite
Calcium Aluminum Silicate Hydroxide
Ca2 Al2 Si3 O10(OH)2.
Prehnite is a member the Phyllosilicates Subclass. Like zeolites, Prehnite can give off water when heated, but can not gain the water back like they can.
Its colour is a pleasant green and is at times quite unique to Prehnite. Prehnite is harder than all of these and lacks Smithsonite’s unusual luster. Hemimorphite is usually blue and Gyrolite is not as glassy. Its color, luster, associations and crystal habits make it a joy to own.