- Cosalite, Quartz
- Kara-Oba W deposit, Betpakdala Desert (Bet-Pak-Dal Desert), Qaraghandy Oblysy (Karaganda Oblast'), Kazakhstan
- Miniature, 4.0 x 2.1 x 2.1 cm
A rich nest of cosalite needles is visible within a stocky, water-clear quartz crystal in this fine specimen from the Kara-Oba deposit of Kazakhstan. Cosalite is an uncommon lead, bismuth sulfosalt and this is a superb and very uncommon combination of the two species. A fine, 2.0 cm, doubly terminated quartz crystal is embedded in one side. The quartz crystal is complete-all-around and nearly pristine.