Fluorite from Hastie's Quarry, Illinois DM1026 egg and isotopic composition

and isotopic composition

this wonderful smoky quartz gwindel specimen is in excellent condition

where they were first extensively studied and described

and construction industries

and clinochlore with its light green platelettes

Fluorite from Hastie's Quarry, Illinois DM1026 egg and isotopic compositionFluorite from Hastie's Quarry, Illinois Approx. Dimensions: 2x1. 5x1. 5 inches Approx. Weight: 48. 8 grams Locality: Hastie's Quarry, Hardin County, Illinois Fluorite from Hasties Quarry (Hardin County, Illinois) is a prized North American mineral because it is one of the few remaining sources of "new" fluorite from the famous Cave in Rock District. While most major mines in the area closed decades ago, Hastie's is an active aggregate quarry that