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Big smoky quarz cluster

Time left
17g 15h 30m 11s
13/11/2026 15:01:00
Estimate
€ 200,00 / 400,00
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Description

Big smoky quarz cluster

Cm 5X4X8
SiO2 — trigonal system (smoky
polycrystalline aggregate)
More information
Typically sourced from the Swiss Alps, Brazil, and Madagascar , this is
an aggregate of smoky quartz crystals formed in alpine clefts or
pegmatitic druses; the brown color results from natural irradiation
color centers on substitutional Al. Hardness 7 Mohs.
A prized
collector’s and museum-display piece; used in interior decoration for
its dramatic look; sought after for the rarity of well-formed clusters.
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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