God for us to design products, we are the porters of nature!

Home | Mineral Specimens | Gem materials | Mineral Datum | Rock | News | Photos | Contact Us
Welcome, please login, or click here to register!
Dominant species
+More..
Riebeckite
Chemical
Formula
[][Na2][(Fe2+)3(Fe3+)2][(OH)2|Si8O22]
Species
Silicates
Crystal
System
Monoclinic
Mohs
Scale
5
Specific
Gravity
3.28-3.44
Color
Usually black, also commonly light blue to blue-black, gray-blue, gray, brown
Streak
Pale gray to bluish-grey.
Luster
Vitreous, Sub-Vitreous
Refractive
Index
n = 1.680 - 1.698 n = 1.683 - 1.700 n = 1.685 - 1.706
Diaphaneity
Translucent, Opaque
Cleavage
PerfectPerfect on
Fracture
Splintery
Crystal Habit:Prismatic, frequently very elongated. May be acicular, especially in late cavities. Sometimes is very acicular in fine-grained, light colored aggregates. Well-terminated crystals are uncommon.
Geological Setting:Syenite and undersaturated rocks
Riebeckite2157
Riebeckite2157
Riebeckite2155
Riebeckite2155
Riebeckite2151
Riebeckite2151
Riebeckite2143
Riebeckite2143
Riebeckite2138
Riebeckite2138
Riebeckite2135
Riebeckite2135
Riebeckite2131
Riebeckite2131
Riebeckite2129
Riebeckite2129
Riebeckite2127
Riebeckite2127
Riebeckite2125
Riebeckite2125
Riebeckite2123
Riebeckite2123
Riebeckite2119
Riebeckite2119
Riebeckite2117
Riebeckite2117