cubic Nesosilicates
Uvarovite (Drusy Crust)
Formula Ca3Cr2(SiO4)3
Crystal Structure
#! Species: Uvarovite
#! System: Cubic (m3m)
#! Habit: Drusy crust of small dodecahedra
cubic[m3m]:{110}@1.0 + {211}@0.4 ~ druse[30]
cubic
m3m
{110} {211}
Quick Facts
Hardness
6.5
Specific Gravity
3.77
Refractive Index
1.87
Optical Character
Isotropic
Physical Properties
- Crystal System
- cubic
- Hardness (Mohs)
- 6.5
- Specific Gravity
- 3.77
- Cleavage
- None
- Fracture
- Conchoidal to uneven
- Lustre
- Vitreous
Optical Properties
- Refractive Index
- 1.87
- Optical Character
- Isotropic
- Dispersion
- 0.027
- Pleochroism
- None (isotropic)
Characteristics
Colours
Emerald green
Localities
Russia (Urals)FinlandTurkeySouth AfricaCanada
Common Inclusions
Typically too small for inclusion study
Known Treatments
None
Crystal Forms
dodecahedrontrapezohedrondruse
Diagnostic Features
Vivid emerald-green; chromium-bearing; typically too small for faceting; drusy crusts
Related Minerals
Other minerals in the cubic system
