Main color :
red
due to chromium, the most sought shade is the pigeon red blood
Color of streak :
white
Luster :
adamantine, vitreous
Hardness :
9.0
Density :
3.97 to 4.05
Cleavage :
none
Fracture :
conchoidal, uneven
Transparency :
transparent
there are also translucent, stony
Refractive Index :
1.762 - 1.778
Double refraction :
0.008
Very weak, uniaxial (-)
visible double refraction :
no
Dispersion :
0.018 (0.011)
Pleochroism :
strong
Number of colors :
2
Red, orange
Absorption spectrum : 694 - 693 - 476 - 475 - 468
Burma rubies spectrum system
pink ruby spectrum system
brown ruby spectrum system
Fluorescence :
variable
Red, depends on the chromium content
Inclusions :
they are common: solid or liquid. Rutile causes the asterism in many gems
Prisms and tabular pseudo-hexagonal crystals. Ruby trapiche in wheel
Crystal system :
trigonal
Astrological sign :
Cancer, Scorpio, Aquarius
Chinese astrological sign :
Pig
Month :
july