刚玉的种类包括（红宝石、星光红宝石、蓝宝石、艳色蓝宝石、星光蓝宝石）。
The variety of boule includes ruby, starlight ruby, sapphire, beautiful sapphire and starlight sapphire.
星光红宝石是极珍贵和稀少，其价值评估是按照它美丽迷人的颜色与星光的呈现为主，透明度反而是其次。
Star rubies are precious rarities. Their value depends on the beauty and attractiveness of the colour and, though only to a lesser extent, on their transparency.
星光红宝石是极珍贵和稀少，其价值评估是按照它美丽迷人的颜色与星光的呈现为主，透明度反而是其次。
Star rubies are precious rarities. Their value depends on the beauty and attractiveness of the colour and, though only to a lesser extent, on their transparency.
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