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剛玉,是紅寶石和藍寶石的礦物學名。即紅顏色的寶石級剛玉就是紅寶石,除此之外的寶石級剛玉全都稱為藍寶石。因此,藍寶石有藍色藍寶石、黃色藍寶石、綠色藍寶石、棕色藍寶石等等。硬度仍是紅寶石和藍寶石的主要鑒定特征之一,能達到莫氏9級硬度的,除了鑽石以外,只有剛玉。在日常生活中,剛玉與鑽石的接觸以及剛玉與剛玉之間的接觸機會也是極少的。因此,對紅、藍寶石來說,亦然是永不磨損的。 紅寶石高質量、大顆粒的天然紅寶石,其價值非常高,甚至有時每粒天然紅寶石的價格高於鑽石。因此,把天然紅寶石
Corundum, is a ruby and sapphire mineral science name. The red color of the gem-grade corundum is ruby, in addition to the gem-grade corundum are all called sapphire. Therefore, sapphires have blue sapphires, yellow sapphires, green sapphires, brown sapphires and more. Hardness is still one of the major qualities of rubies and sapphires, and can reach 9 Mohs’ hardness, with the exception of diamonds, which have only corundum. In everyday life, there is very little chance of contact between corundum and diamond and between corundum and corundum. Therefore, for red, sapphire, it is never wear and tear. Ruby High-quality, large-grained natural ruby, its value is very high, and sometimes each natural ruby prices higher than diamonds. So put the natural ruby