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Rubies decoded: ‘Color is just one piece of the puzzle’
稀有宝石在哈佛新展览中闪耀
This Medieval Byzantine Shipwreck Boasts More Gold Treasures Than Any Other Vessel Found Beneath the Mediterranean
这艘船于公元七世纪或八世纪在亚得里亚海沉没。船上的货物包括一枚可能与希拉克略皇帝有关的金图章戒指以及镶有红宝石、祖母绿和珍珠的金腰带