The tetra-hedral molecules described by the equation Si(OH)4. Related Articles: Tiny bubble theory of Lake Superior agate formation (Part 1): Tiny bubbles, the husk and silica accumulation in the cavityTiny bubble theory of Lake Superior agate formation (Part 2): Results from other laboratories and inclusions in Lake Superior agatesTiny bubble theory of Lake Superior agate formation (Part 4): Tiny bubbles and reflections on theories of agate formation« Back to Glossary Index