A neat specimen of Bertrandite on Quartz from the Kara-Oba Tungstan Deposit, Kazakhstan. The Bertrandite has developed as a number of euhedral crystals forming a partial angled 'belt' around the Quartz. The crystals of Bertrandite measure up to 0.7cm, and have a lenticular cross section. They are lustrous and gemmy to translucent white. The Quartz crystal has a flattened form with a stepped termination, translucent to transparent with a fair luster. Small crystals of Quartz are also present, along with minor creamy Muscovite and silvery Arsenopyrite.