black star sapphire 中文意思是什麼
black star sapphire
解釋
黑星藍寶石-
Black star sapphire
黑星藍寶石 -
The biggest mineral of toughness is the black diamond in the world, it is 10 degrees with the black diamond, the toughness of other treasure malachite is relative : the jade is 9 nephrite ; the emerald, star ruby, sapphire are 8 ; diamond, crystal, aquamarine are 7 - 7. 5 grades
世界上韌性最大的礦物是黑金剛石,如以黑金剛石為度,其它寶玉石的韌性相對為:玉為軟玉翡翠紅寶石藍寶石為金剛石水晶海藍寶石為. 5等。
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