Gemstones.
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  1. #1
    Administrator
    Feb 2018
    45

    Thumbs up Opal gemstones

    >

    . "" . . .

    (SiO 2. nH 2 O). . " mineraloid " " mineral ".

    ! !
    . . 5.5 6.0 . . - .




    . " " "" "". . "play-of-color." " ". .

    :
    1)
    2)
    3) .




    " "
    . . . .


    . . 90 ٪ . .

    : . : . .



    . . . . . !





































    opal



















 

  1. : 0
    : 03-20-2018, 05:23 PM