Two fascinating fossilized blister pearl specimens possibly 86 million years old reveal insights into ancient mollusks.
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The Bangkok laboratory recently examined a pearl containing a laminated shell bead nucleus with mysterious properties.
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Intriguing bicolor sapphires and spectacularly colored thin sapphire slabs are produced by mines in Rock Creek and Inverell, respectively.
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A nondestructive rapid screening technique uses fluorescence spectroscopy to identify treated colored pearls.
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Discovered in the Italian Alps, a new mineral species of tourmaline has been named for Dr. Barbara Dutrow in honor of her teaching and research contributions to the field.
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Balinese carvers using traditional methods create striking pieces from Australian opal as well as unusual materials such as mammoth tusk and bovine bone.
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Skillfully carved, fantasy cut, or recut items enhance the beauty and value of myriad gem materials.
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A delicate, ethereal necklace depicting a diamond butterfly caught in a gem-studded spider’s web won the third annual Gianmaria Buccellati Foundation student jewelry design contest.
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Advanced analytic techniques are critical for separating Ethiopian feldspar from Oregonian and copper-bearing feldspar with undetermined color origin.
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past gems & gemology issues
Winter 2024
Volume 60, Issue 4
Fall 2024
Volume 60, Issue 3
Summer 2024
Volume 60, Issue 2
Spring 2024
Volume 60, Issue 1
Winter 2023
Volume 59, Issue 4
