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CT。 73.20 天然紅寶石原石 標本- 14.64 g
編號 76798975
編號 76798975
Garnets have been used since the Bronze Age as gemstones for jewellery and ornaments and as abrasives. Because garnet is so hard and resistant to weathering, it can be used as skid-resistant road aggregate, skid resistant paints, and for filler