mineral corundum 中文意思是什麼
mineral corundum
解釋
礦物剛玉-
Ruby is the red variety of the mineral corundum, one of the hardest minerals on earth, of which the sapphire is also a variety
紅寶石的礦物名稱為剛玉,其硬度是地球上硬度最佳的礦物之一,而藍寶石也屬剛玉家族。在摩氏硬度表中剛玉的硬度是被列為 -
Long ago, it was decided that all gemstones of the mineral corundum should be referred to as sapphire, except the red colour, which was called ruby
。最後達成的協議是:稱紅色的藍寶石為紅寶石,稱其他顏色為藍寶石和彩色藍寶石。
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