Tag : Imitations

Diamond testers with a limited performance

Diamond testers with a limited performance. Published in Journal of Gemmological Association of Hong Kong GAHK, 2017, 38, 37-39.

Author(s): H.A. Haenni

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Modern Doublets from Germany and India

Modern Doublets from Germany and India. Published in Journal of Gemmology, 2015, 34, 6, 479-481.

Author(s): H.A. Haenni, U. Henn

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Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite

Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite. Published in Journal of the Gemmological Association of Hong Kong GAHK, 34, 62-64

Author(s): M.S. Krzemnicki

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Zircon ou zirconia à ne pas confondre

Zircon ou zirconia à ne pas confondre. Published in Journal Suisse d’horlogerie et de bijouterie, 1989.

Author(s): H.A. Haenni

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