18

Pyrophyllite

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17g 9h 14m 21s
13/11/2026 14:17:00
Estimate
€ 50,00 / 100,00
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Description

Pyrophyllite

W. 11 - D. 8 - H. 9 cm
Al2Si4O10(OH)2 — monoclinic system (phyllosilicate)
More information
Typically sourced from China, the United States
(North Carolina), South Korea, and Brazil, this mineral is chemically
and structurally similar to talc. It forms through low-grade
metamorphism of aluminum-rich rocks (hydrothermal or regional
metamorphism). Very low hardness (1–2 Mohs), density 2.65–2.90
g/cm³, greasy feel.
Used industrially in ceramics, cosmetics, and as a refractory material; compact varieties are carved
into small ornamental objects; valued by collectors for its rarity in aesthetic specimens.
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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