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Stokesite with Plumbomicrolite - Urucum Mine - Galieia - Minas Gerais - Brazil (#:MINS7967)

Double spheroidal growth of well defined crystals of this rare calcium and tin silicate. With small Plumbomicrolite orange crystals. Found in 2007

Formula :
Ca2Sn2[Si6O18] * 4 H2O

System: orthorhombic Hardness:6 Rarity:very rare
Strunz id:VIII/F.29-30 - SILICATES
Name origin: Named after Sir George Gabriel Stokes (1819-1903), mathematician and physicist, University of Cambridge (England), after whom is named Stokes law, describing the force acting on a particle moving in a fluid medium.

Specimen weight:10 gr.
Crystal size:1,5 cm wide
Overall size: 15mm x 15 mm x 22 mm



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Brazil 1-(TN) Thumbnail (Max 3.1 cm) Minservice - Rare & Uncommon Minerals
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Stokesite with Plumbomicrolite - Urucum Mine - Galieia - Minas Gerais - Brazil


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