These are five pieces of oval cabochon-cut, natural Indian rainbow Moonstone gems. They weigh 0.55cts (2.75cts total) and measure 6x4mm each.
Below are the technical details:
Size:
5 Pieces of 6x4mm
Shape:
Oval Cabochon-Cut
Colour:
Rainbow-Effect
Clarity:
Translucent
Lustre:
Bright
Origin:
India
Hardness:
6 - 6.5
Specific Gravity:
2.64 - 2.68
Refractive Index:
1.533 - 1.552
Chemical Composition:
NaCa(Al, Si)AlSi2O8, Sodium Calcium Aluminum Silicate
Crystal Structure:
Monoclinic