Reports on the geological setting and gemological properties of violet-blue gem cordierite from new deposits located in British Columbia.
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Explores eclogitic diamonds, which make up a significant portion of the gem diamond market, and what they reveal about Earth’s dynamic processes.
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Examines dissolution features of heliodor and green beryl from a Ukrainian pegmatite field and offers criteria to distinguish them from samples found in other localities.
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Details the colors and optical effects caused by metallic copper inclusions in this gem-quality feldspar.
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Investigates the various chromophores responsible for color in four types of yellow sapphire.
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A colorless transparent crystal inclusion in diamond is reminiscent of a stone splashing in water.
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An examination of three Burmese chameleon amber specimens using 3D fluorescence spectroscopy.
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Trigons and tetragons observed in a chameleon diamond indicate both octahedral and cubic growth.
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The first report of iridescent andradite from China.
Read MoreA cluster of bladed columbite crystals is identified in colorless topaz.
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past gems & gemology issues
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