G&G’s new column takes a closer look at the hidden wonders found in gemstones.
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This large marble-hosted occurrence in the Pamir Mountains is a potentially productive source of corundum, including ruby with a bright red color reminiscent of “pigeon’s blood” Burmese rubies.
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A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.
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Examines a form of asterism comprising two six-rayed stars, one white and one that exhibits the stone’s bodycolor. Firsthand accounts and a survey of patent documents reveal that diffusion has been used to create or enhance this optical phenomenon in synthetic and possibly natural corundum since the 1950s.
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A carving identified as blue chalcedony shows evidence of epoxy resin treatment.
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A natural Fancy Intense blue diamond submitted to the New York lab shows the highest boron concentration ever reported in a natural specimen.
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A musgravite specimen’s inclusions result in an optical phenomenon unusual for the material.
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A pink sapphire bead with drill holes revealing ruby fragments is examined.
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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
