20042 Alabandite, Uchucchacua Mine, Oyon Province, Lima, Peru October 27, 2019 Steve Peru South America Sharp octahedral grey crystals of alabandite in a matrix of fluorite and calcite, both of which fluoresce (blue and pink respectively). Click for full sized image…
Australasia Australia Victoria 7284 JL1128 Hyalite Opal, Calcite, Lilydale Quarry, Lilydale, Victoria December 12, 2020
Australasia Australia Queensland 7008 JL2626 Malachite, Quartz, Calcite, Magpie Mine, Cloncurry District, Mount Isa – Cloncurry area, Queensland September 23, 2019
Canada North and Central Americas ncat VHD4, Calcite, Highway 7, Madoc, Ontario, Canada November 17, 2019