Crystal properties
Crystal growth method
Skull Melting process
Crystal growth orientation
(001), (111), (110)
Maximum size
ca. 7x7x10 mm
Variations
Dopands on request
Crystallographic structure
a = 5,411 A
Mineralogical synonyms
None
Twinning structure
Twinfree
Colour
Black to dark blue
Density
7,215 g/cm³
Melting point
2400 °C
Boiling point
3500 °C
Hardnes
7 (Mohs)