9

Quarz geode

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17g 2h 20m 14s
13/11/2026 14:08:00
Estimate
€ 50,00 / 100,00
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Description

Quarz geode

0,477 477 W. 8 - D. 9 - H. 4 cm
SiO2 — trigonal system (polycrystalline aggregate)
More information
Typically sourced from Brazil (Minas Gerais),
Madagascar , and Arkansas, this is an aggregate of multiple quartz
crystals grown from a common base within a cavity or geode,
precipitated hydrothermally from cooling silica-rich fluids. Each
crystal retains quartz’s typical trigonal symmetry , hardness 7 Mohs.
A popular décor piece valued for its natural aesthetic; used in
decoration, museum display cases, and as a collector specimen; also
common in meditation spaces.
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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