ABOUT lapis lazuli
Lapis lazuli is a gemstone of the kind that might have come straight out of the Arabian Nights: a deep blue with golden inclusions of pyrites which shimmer like little stars.
|Color||Blue, mottled with white calcite and brassy pyrite|
|Mohs scale hardness||5.0 - 5.5|
|Specific gravity||2.70 - 2.90|
|Refractive index||1.500 - 1.550|