Colourless/yellowish Boussingaultite from The Geysers, West Mayacmas Mining District, Sonoma County, California, USA. 45 x 25 x 17mm.
![](https://jmelville.mineralcollective.com/wp-content/uploads/2023/12/2023-12-17-20-30-11-BR8S4-copy-scaled.jpg)
Colourless/yellowish Boussingaultite from The Geysers, West Mayacmas Mining District, Sonoma County, California, USA. 45 x 25 x 17mm.