Stromatolite Slab from Bolivia (with stand) bc39badc492c4c2d735262d41ea798bb Topaz occurs in the igneous

Topaz occurs in the igneous rock rhyolite

Limited availablity in this material

rating a 9 on the Moh’s scale

until the wood is transformed into stone

Quartz is composed of silica (SiO2)

Stromatolite Slab from Bolivia (with stand) bc39badc492c4c2d735262d41ea798bb Topaz occurs in the igneousBillions of years ago, Cyanobacteria, (Blue Green Algae) was the most abundant life form on our planet, forming in lakes, oceans, on rocks or almost anywhere there was moisture. These bacteria are credited for the creation of most of the Earth's oxygen. Over long periods of time, some of these bacteria worked its way through sand and other sediments, binding it together, dying off and then eventually transforming it into stone. That stone is known as