CrocoiteColor is bright orange-red to yellowish-red.
Luster is adamantine to greasy.
Transparency: Crystals are translucent to transparent.
Crystal System is monoclinic; 2/m
Crystal Habits include prismatic crystals somewhat square in cross-sections, often striated lengthwise. Terminations are usually poorly developed and appear uneven or pitted. Also, granular and columnar.
Cleavage is distinct in two directions lengthwise, prismatic.
Fracture is conchoidal and uneven.
Hardness is 2.5 - 3.
Specific Gravity is approximately 6.0+ (very heavy for translucent minerals)
Streak is orange-yellow.
Other Characteristics: Index of refraction is a very high 2.36
Associated Minerals are wulfenite, pyromorphite, cerussite, limonite and vanadanite.
Notable Occurrences include Dundas District, Tasmania, Australia; Ural Mountains, Russia and Inyo and Riverside Counties in California, USA.
Best Field Indicators are crystal habit, locality, density, high luster and color
Crocoite - Tasmania
Immagine:
38,41 KB(C) Chinellato Matteo cubo = 1 cm.
