"Hexagonal-rhombohedral. Crystals are very varied in habitat, often highly complex. Over 300 different…
"Hexagonal-rhombohedral. Crystals are very varied in habitat, often highly complex. Over 300 different…
"Hexagonal-rhombohedral. Crystals are very varied in habitat, often highly complex. Over 300 different…
"Hexagonal-rhombohedral. Crystals are very varied in habitat, often highly complex. Over 300 different…
"Hexagonal-rhombohedral. Crystals are very varied in habitat, often highly complex. Over 300 different…
This illustration shows calcite crystals. They are hexagonal-rhombohedral, though actual calcite rhombohedrons…
"...a variety of calcite, crystallizing in scalenohedral forms; so named from a fancied resemblance…