The combination of the two minerals creates an incredible play of light as light is reflected off of the myriad of pits and pock marks left by the clinochlore's interference with the quartz surface growth
and natural inclusions like air bubbles or ancient debris
and there is some sort of inclusion or impurity within the fluorite that causes some white fluorescence as well
A beautiful smoky crystal in excellent condition grows through the central termination of a lustrous schorl crystal
• Hardness: Considered one of Australia's hardest opals
Fluorite from Hastie's Quarry, Illinois TD3974 heliodor The combination of the twoFluorite from Hastie's Quarry, Illinois Approx. Dimensions: 3x2x2 inches Approx. Weight: 285 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 produces
