19

Aragonite

Time left
17g 14h 12m 41s
13/11/2026 14:18:00
Estimate
€ 50,00 / 100,00
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Description

Aragonite

Cm 7X4X3
CaCO3 — orthorhombic system (calcite
polymorph)
More information
With its type locality at Molina de Aragón, Spain
(namesake), and deposits in Morocco and Mexico, this mineral is
stable under higher pressure or in rapid-precipitation settings (hot
springs, mollusk shells). It often forms radiating needle-like or star-
twinned “sputnik” aggregates. Hardness 3.5–4 Mohs, density 2.94
g/cm³.
Valued by collectors for its unusual geometric forms; used
decoratively; also a subject of scientific study in biomineralization
(pearls, nacre).
Time auction 1251

Historia Naturalis

mon 26 October - fri 13 November 2026
The description sheets do not always indicate the state of conservation of the goods, we invite you to always request the condition report before making your offers
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