品种

Recently, the news reported that one special kind of rhino from Africa just passed away, which meant the disappearance of this lovely creature.

托帕石是一种坚硬，透明的矿物质。它是铝，硅化合物，氟。宝石黄玉是有价值的。珠宝商把这种石头品种黄玉。最有名的黄玉范围从丰富的黄色至浅棕色或粉红色的颜色。黄玉是最难的宝石矿物之一。在矿物硬度表，它有一个 8 等级，即一刀子不能切断它，而石英黄玉