149

Two Agate geode sections

Time left
17g 18h 24m 48s
13/11/2026 16:28:00
Estimate
€ 150,00 / 300,00
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Description

Two Agate geode sections

SiO2 (chalcedony/agate) — fibrous
microcrystalline structure
More information
Typically sourced from Brazil, Uruguay , Morocco, and Madagascar , these are
cut and polished sections of geodes containing agate, a
microcrystalline variety of quartz, deposited in concentric bands
within volcanic cavities through cyclical precipitation of colloidal silica
colored by metal oxides.
Widely used for bookends, coasters, and decorative objects;
prized by collectors for its infinite variety of patterns; sometimes
artificially dyed to enhance color .
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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