Quartz (Var: Chalcedony) : SiO2

Copyright © Rob Lavinsky & irocks.com
minID: TX4-QAP

Quartz (Var: Chalcedony) : SiO2

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 18.2 cm x 8.6 cm x 5.5 cm

18.2 x 8.6 x 5.5 cm (largest). A stunning large cabinet pair from a sliced and polished hollow, very elongate colony of coral - you can see the pattern on the outside - that has been replaced or filled inside with botryoidal and banded chalcedony. The lustrous botryoids have a gorgeous variety of color. They look like pearls. This is one of those unusual cases where biology meets mineralogy. This dramatic specimen is from the Hauck Collection.

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Photo added: 6th Jan 2010