AUSSIE PREHNITE SLAB 3
A beautiful, top grade Aussie Prehnite Slab 3. A super and unusual display piece. This material is an unusual green colour that is hard to capture in photos. They all look a little yellow but the piece is more green in person. This slab has been liquid glassed for a tough and glossy finish to show the colour at it’s best.
Wave Hill, NT, Australia.
17cm x 9cm x 0.8cm, 238g.
Prehnite: Ca2 Al2 Si3 O10(OH)2
Calcium Aluminum Silicate Hydroxide.
Prehnite is often found with zeolites and is sometimes thought of as a zeolite. But zeolites are actually Tectosilicates and 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. Some Minerals that can be confused with Prehnite include Gyrolite, Smithsonite and Hemimorphite. Prehnite is harder than all of these and lacks Smithsonite’s unusual luster. Hemimorphite is usually blue and Gyrolite is not as glassy.