Sapphire color change from violet to royal blue 4.0 carat

Variety sapphire

Color Blue

Measurements 9.84×6.88×6.03   MM

Weight carat/    4.0

Clarity (type 2) Eye Clean

Shape –  Cushion

Treatments – heat only

MAGNIFICATION – checked

Parochialism Dichroic

Hardness(Ref Data) 9

Refractive index checked

Specific Gravity 4 (+-01)

Optical Character, Double refractive