常見(jiàn)例句Specimen of Wulfenite is very common. However, Wulfenite ON Dioptase is quite uncommon. It is only discovered at Tsumeb, Namibia, with limited quanities. 鉬鉛礦是一種相當(dāng)受歡迎的礦物;但;長(zhǎng)在透視石上的鉬鉛礦就相當(dāng)稀少;只在西南非的納米比亞發(fā)現(xiàn)過(guò)一次;且數(shù)量相當(dāng)有限.;透視石又稱(chēng)為"翠銅礦" 返回 dioptase