Mineral: Greenockite on sphalerite
Locality: Joplin Field, Tri-State District, Jasper County, Missouri, USA
Dimensions: 5.5 x 7.0 cm, FOV=2.5 cm

Description: A greenish-yellow film of micro-crystallized greenockite partially covering brown sphalerite crystals.

All pictures, text, design © Forum FMF 2006-2024