Ruby, the common name for the mineral corundum in its red form, is a precious gemstone.
红宝石是对红色矿物刚玉的俗称，它是一种珍贵的宝石。
Verneuil synthetic corundum is by far the most common in the market. Thus it is vital that gemologists are familiar with the key identifying features - curved growth lines and gas bubbles.
维尔纳叶法合成刚玉是目前市场上最常见的，因此，弧形生长纹和气泡是宝石学家进行鉴定时重要而有力的关键依据。
A sapphire, the common name for the mineral corundum in its transparent blue form, sparkles.
这是一颗熠熠生辉的蓝宝石。对显而易见的蓝色矿物刚玉通常称之为蓝宝石。
A sapphire, the common name for the mineral corundum in its transparent blue form, sparkles.
这是一颗熠熠生辉的蓝宝石。对显而易见的蓝色矿物刚玉通常称之为蓝宝石。
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