Calcite - Ojuela mine, Mapimi, Durango, Mexico
Perfect crystal of hexagonal calcite, colorless, associated...
Biterminated scalenohedrons of white calcite on amethyst.
Specimen crystallized on both sides.
7.5 x 4.5 x 2.5 cm
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Perfect crystal of hexagonal calcite, colorless, associated...
Colourless but shiny hexagonal calcite crystals accompanied by...
Small plate made up of several rather chunky amethyst crystals...
Specimen composed of two clusters of creedite (calcium...
Shiny, well-formed wulfenite crystals associated with small...