adj.半珍贵的;准宝石的
Semiprecious gemstones, tourmalines belong to a family of borosilicate minerals. 准宝石的宝石,电气石属于一个家族的硼硅酸盐矿物。
Azurite's brilliant color adds to its popularity in creating semiprecious stones. 兰铜矿灿烂的色 彩加上它的声望造成准宝石的宝石。