Abstract
IN November 1945, Count Taaffe, a Dublin gemmologist, asked us to identify a pale mauve faceted gem-stone in which, though ostensibly a spinel, he had detected small but distinct double refraction by direct observation under a binocular microscope.
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ANDERSON, B., PAYNE, C. & CLARINGBULL, G. A New Gem Mineral. Nature 167, 438 (1951). https://doi.org/10.1038/167438b0
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DOI: https://doi.org/10.1038/167438b0
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