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Orange and Brown Gemstones

EVT.VN 9 năm trước 488 lượt xem

Orange and Brown Gemstones

    Orange and Brown Gemstones

     

     

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    Gemstone Crystal System Density Hardness Refractive index Treatments
    agateAgate microcrystalline 2.66 6.5-7.0 1.544-1.553 dying
    amberAmber amorphous 1.08 2.0-2.5 1.54 heating, oiling, reconstitution
    carnelianChalcedony microcrystalline 2.66 7 1.544-1.553 dying
    chrysoberylChrysoberyl orthorhombic 3.72 8.5 1.746-1.755 none
    coralCoral trigonal 2.65 3.5-4.0 1.486-1.658 dying
    diamondDiamond cubic 3.52 10 2.417 radiation, drilling, fracture filling
    garnetGarnet cubic 3.40 5.5-6.5 1.700-1.746 none
    jadeiteJadeite microcystalline 3.34 6.5-7.0 1.660-1.680 dying
    opalOpal amorphous 2.15 5.0-6.5 1.450 fracture filling
    spinelSpinel cubic 3.60 8 1.718 none