Mg4Al2[SiO4]3
magnesium aluminium silicate
Main color :
red
Other colors :
blue, brown, orange, pink
some varieties exhibit the phenomenon of color changing depending on the type of lighting
Color of streak :
white
Luster :
vitreous
Hardness :
6.5 to 7.5
Density :
3.65 to 3.90
Cleavage :
indistinct
Fracture :
conchoidal, uneven
Transparency :
transparent
Sometimes so colorful that it seems opaque
Refractive Index :
1.720 - 1.755
Double refraction :
0.000
None, isotropic, but sometimes crystals show some polarization anomalies
visible double refraction :
no
Dispersion :
0.022 (0.015)
Pleochroism :
absent
Number of colors :
1
Absorption spectrum : 687 - 685 - 620 - 520
rhodolite spectrum system
pyrope spectrum system
pink malaya spectrum system
Fluorescence :
none
Inclusions :
many needles and crystals of rutile, zircon, apatite
Astrological sign :
Cancer, Leo, Scorpio, Aquarius
Chinese astrological sign :
Rat
Month :
january