Name | CHALCEDONY | Variety | CHALCEDONY AFTER ARAGONITE | Origin | Las Plumas (Chubut) Argentina | Hardness | 7 | Composition | SiO2 | Crystaline sys. | TRIGONAL
| Size | 6,5x4,5x4,5 cm | Weight | 152 gr |
Description:
In mineralogy, a pseudomorph is a mineral that appears in an atypical form, resulting from a substitution process in which the appearance and dimensions remain constant, but the original mineral is replaced by another. In this beautiful specimen, chalcedony "filled" a mould of multiple crystal twinnings of aragonite which had disappeared due to a previous geological process. (See also CBR003) |
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CHALCEDONY
VARIETY CHALCEDONY AFTER ARAGONITE
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