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Origin: Indonesia
- Age: Miocene, 20 million years ago
- Size: D21cm
- Description: Dating from the Miocene, this 20 million years cut and polished petrified wood sphere reveals inner structure of rings with various spectrum of beige and black from mineralisation.
- Additional information: Petrified wood consists of fossil
wood, in which all organic materials have been replaced by minerals, while maintaining the structure of the wood. The fossilization process takes place under the ground, when a tree becomes buried under sediment, and may take millions of years. The smallest details can be immortalized including tree rings
and various tissues. Petrified wood has a hardness of 7 on the Mohs hardness scale, the same as quartz.