Specimen size: 8.75 in x 5.5 in, .375 in thickness
Single side polish
Spherulitic Rhyolite (Rainforest Jasper)
Volcanic eruption occurred some 120 Million years ago.
Mined only in Mt. Hay of central Queensland Australia, Rhyolite Rainforest Jasper is a rare type of rhyolitic lava stone. As the lava slowly cooled and solidified, trapped gas bubbles created pockets which are later filled, or partially filled by flows of siliceous material such as Agate, Jasper, Quartz Crystal or other minerals. The Rhyolite usually occurs in association with Thunder Eggs, another volcanic gemstone.
Rainforest Jasper is known in different parts of the world by several other names. These include Spherulitic Rhyolite, Agatised Rhyolite and Green Rhyolite.
This unique gemstone was first mined commercially in the late 1960’s and continues to be a popular gemstone with lapidarists and collectors around the world.