Gemstones.
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  1. #1
    Administrator
    Feb 2018
    45

    Post ʿ

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    7 . . .



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    : 6X4 .




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    Diaphaneity
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    7
    2.6 2.7

    SiO 2

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    Prasiolite
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    . prasiolite . " ". " ". " " " " . [3]

    prasiolite . prasiolite . 150 .

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    . 7 . 7 . . . .

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    ..
    amethyst