Fine mineral specimen: Galena spinel law twins with quartz crystals, Madan ore field, Bulgaria

The fine mineral specimen presented in this video consist of a cluster of lustrous spinel law twinned galena crystals with colorless gem quartz crytals from The Madan ore field, Bulgaria. This fine mineral specimen measures 8.5 cm across.

Galena is lead sulfide. Madan is one of the world greatest galena producing localities.