Red calcite from Mexico
You will be picked on at random
Sizes range from-
5.9cm x 5.1cm - 7.7cm x 4.8cm
Weights range from-
126g-164g
Red calcite is a variety of calcium carbonate. Its colour comes from iron oxide inclusions or staining,such as hematite,within the crystal structure.
Crystal system-Trigonal
Mineral class-Carbonate
Hardness-3 on the MOHs scale
Rock formation-
Sedimentary- calcite is a primary rock-forming mineral in sedimentary settings,making up the bulk of limestone,chalk,and travertine.
Metamorphic- When limestone undergoes heat and pressure,calcite recrystallises to form marble.
Hydrothermal and secondary veins- Red calcite frequently precipitates from mineral-rich hydrothermal fluids in rock fractures,caves,and volcanic cavities. Iron rich fluids present during or after crystal growth impart the red or brick-red colouration.
