Calcite
Sullivan & Waukeag Mine, Sullivan Mining District, Sullivan, Hancock County, Maine, USA
Translucent to transparent calcite cleavage (a bit bigger than a matchbox car) in long-wave UV light from smelter tailings at tideline of Sullivan-Waukeag Silver Mine, Sullivan, Maine. Collected by Doug Watts, Feb. 22, 2018. Second image shows same specimen in normal light. Calcite is common in gangue of this mine but is usually milky opaque ...