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The Carlsbad laboratory recently had the opportunity to examine a multi-strand necklace of graduated round ruby beads (figure 1), measuring 2.72 to 6.13 mm in diameter. Standard gemological testing ...

For years, Van Cleef and Arpels has harboured a close relationship with rubies. The fiery gemstone has seen its potential eased out in the most stunning ways, as plump ruby cabochons, as a blood-red ...