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  1. Gem Spectrum

    The Allure of Classic Kashmir Sapphires – by Rui Galopim de Carvalho (opens in a new tab)

    Sapphire connoisseurs know that “Classic Kashmir” is a trade term that has been used in the markets to describe blue sapphires with visual and chemical characteristics consistent with those from the historical Kashmir occurrence in India, namely intense blue colour with a velvety appearance caused by profuse minute rutile inclusions. This designation is typically attributed…

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  2. Gem Spectrum

    AIGS Inclusion of the Month (November 2026) – a Biotite Crystal Frozen in Time within Peridot (opens in a new tab)

    Hidden within this peridot from Mogok, Myanmar lies a tiny crystal of biotite, surrounded by a delicate strain (dislocation) halo. Captured during the gemstone's natural growth, this inclusion offers a rare glimpse into the geological environment in which the crystal formed deep within the Earth.

    Read the full story at Gem Spectrum (opens in a new tab)

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