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Mineralati

Minerals

Talc

Mg3Si4O10(OH)2

Quartz, Talc Locality: Specksteingrube, Goepfersgrun, Fichtelgebirge, Bavaria, Germany Size: small cabinet, 7.0 x 5.5 x 4.9 cm Talc pseudo after Quartz I LOVE THESE THINGS! WHAT A NEAT EXAMPLE OF INTERESTING MINERALOGFY, having talc replace a hard mineral like quartz !?!This is an incredibly rare pseudomorph of talc after quartz on massive talc from Germany. These pseudomorphs are quite old, having come out of the ground prior to the 1930�s. Unique to this location, the crystals are very sharp and have a soft vitreous luster. One of the hardest pseudomorphs to find in any condition and this piece is nearly perfect, AND OF LARGE SIZE. As you can imagine, this is a "must have" for any pseudomorph collector. Ex. P. Pohndorf collection (1931). E. Mitchell Gunnell and Hauck labels included with piece.

Robert M. Lavinsky / CC BY-SA 3.0, via Wikimedia Commons · CC BY-SA 3.0 · Source

Overview

Softest mineral on the Mohs scale.

Identification characteristics

  • Mohs hardness 1
  • Streak: White
  • Lustre: Pearly

Formation and occurrence

Metamorphic ultramafic rocks

Common uses

Talcum powder, ceramics