කිරිංචි

කිරිංචි
Spinel. 4.13ct and 1.83ct.
General
Category	Oxide minerals Spinel group Spinel structural group
රසායනික සූත්‍රය	MgAl2O4
Strunz classification	04.BB.05
Identification
පාට / පැහැය	Various; red to blue to mauve, dark green, brown, black
Crystal habit	Cubic, octahedral
Crystal system	Isometric
Cleavage	Indistinct
Fracture	Conchoidal, uneven
Mohs scale hardness	7.5–8.0
Luster	Vitreous
Streak	සුදු
Diaphaneity	Transparent to translucent
Specific gravity	3.6–4.1
Optical properties	Isotropic
Refractive index	1.719
Pleochroism	Absent
Solubility	none
Other characteristics	Nonmagnetic, non-radioactive, sometimes fluorescent (red)
References