Esperite (yellow), willemite (green) and calcite (red) from Franklin, New Jersey shown under short w
Esperite (yellow), willemite (green) and calcite (red) from Franklin, New Jersey shown under short wave ultraviolet and white light. Non-fluorescent minerals on the rock include franklinite (black) and some minor zincite (tiny red crystals). According to Wikipedia, “Esperite is a rare complex calcium lead zinc silicate (PbCa3Zn4(SiO4)4)… [It] has a white, greasy appearance in daylight and is much prized for its brilliant yellow green fluorescence under shortwave ultraviolet light.“ -- source link
#esperite#willemite#calcite#crystal#crystals#mineral#minerals#fluorescent#fluourescent minerals#franklin nj#short wave#ultraviolet#cool rocks