Thunder Eggs

Gallery of Thunder Eggs


Gallery of Spheres


Gallery of Slabs

Mystic Silica

Whilst being exquisitely beautiful and full of physical and chemical interest, I do not believe inanimate stones have any magical, spiritual or healing powers. Nevertheless, many people from all over the world do hold such views and thus a page on “mystic Silica” must…

Microscopic Silica

The colors and patterns found in the Silicas are due to inclusions of metal ions, crystals of other compounds, bits of “dirt” . Beautiful as they are when just looked at, under the microscope an even more beautiful world of colors shapes, swirls and…

Organic Silica

Silica has a unique property in that it can fossilize organic material, by replacement but it does preserve perfectly the organic structures that were originally present.


Perhaps the best known form of silica is glass. When molten silica cools rapidly, it doesn’t have time to align into a well organized structure (crystals) and stays in a higgledy-piggledy disorganized (albeit extremely viscous) liquid. This may occur in nature via  several mechanisms.


Silica can exist in several polymorphs and these forms can occur in a myriad of different guises:-


Sometimes within old lava fields are found rounded “geodes” of silica often with a rhyolite exterior.  These are known as agates, or Thunder eggs. Much like human beings, these geodes are built on the same basic pattern but each one is different from all…