Aragonite is one of two important natural calcium carbonate (CaCO3) minerals, the other, and major variety, being calcite. Both aragonite and calcite can be formed by physical-chemical and by biological (skeleton and shell forming) processes. Aragonite differs from calcite by its crystal system, which is orthorhombic, while calcite is trigonal. Aragonite can be crystalline, in pseudo-hexagonal columnar habitat, but also forms non-crystalline aggregates, such as the botryoidal (grapelike) variety in this example. Sample is from Ighoud in Central Morocco, actual length 310 millimetres.
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Details
Creative#:
TOP26544442
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
N/A
Property Release:
N/A
Right to Privacy:
No
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