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Hyalophane aka Jaloallofane Tumble Stone 20-25mm

Hyalophane aka Jaloallofane Tumble Stone 20-25mm

  • £24.95


Hyalophane or jaloallofane is a crystalline mineral, part of the feldspar group of tectosilicates. It is considered a barium-rich potassium feldspar. Its chemical formula is (K,Ba)[Al(Si,Al)Si2O8], and it has a hardness of 6 - 6frac12;


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