A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public — SUITABILITY OF STONES FOR VARIOUS TYPES OF JEWELS, AS DETERMINED BY HARDNESS, BRITTLENESS, AND CLEAVABILITY

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A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public SUITABILITY OF STONES FOR VARIOUS TYPES OF JEWELS, AS DETERMINED BY HARDNESS, BRITTLENESS, AND CLEAVABILITY · ch 25/41

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