Iowaite

Rainforest Rhyolite tumbled is valued for its beautiful, unusual patterns and bright, intense colors. This unique stone is produced from the material mined only at Mt Hay in Western Australia. It's commonly sold tumbled, but it's also used for jewelry and home decor.

Kernite, also known as rasorite, is a hydrated sodium borate hydroxide mineral with formula Na2B4O6(OH)2·3H2O. It is a colorless to white mineral crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. It is relatively soft with Mohs hardness of 2.5 to 3 and light with a specific gravity of 1.91. It exhibits perfect cleavage and a brittle fracture. Kernite is soluble in cold water and alters to tincalconite when it dehydrates. It undergoes a non-reversible alteration to metakernite (Na2B4O7·5H2O) when heated to above 100 °C.