Old Moissanite

leon mege moissanite yellow green illustrationPro:

Hardness, dispersion

Con:

Man-made, double refraction, pleochroism, yellow-green tinge

 

 

 

Moissanite is a crystal form of silicon carbide and was discovered in a meteorite that hit the Earth 50,000 years ago. In 1893 Henry Moissan won the Nobel prize for proving that moissanite is in fact a new mineral. That doesn't mean much, Yassir Arafat once won the Nobel Peace prize too.

By God's grace moissanite was not used in jewelry until 1998. In 1998 a North Carolina-based R&D lab synthesized Moissanite. Judging by the stone's look the Cree laboratory was the same place where Doctor Frankenstein earned his degree.

  Diamond Moissanite
Refractive index 2.42 2.65
Dispersion .044 .104
Hardness (Mohs scale) 10 9.25
Color D-Y K-P
Weight 3.53 g/cm3 3.21 g/cm3
Heat Resistance up to 800 °C up to1800 °C
Double refraction No Yes

 

In conjunction with Cree, Charles & Colvard got the exclusive worldwide manufacturer and marketer rights of lab-created moissanite. The patent protecting the manufacturing process will expire in a few years when the prices are expected to drop.

Moissanite is rated at 9.25 on the Mohs hardness scale - the only stone harder is a diamond. Moissanite is very easy and safe to work with, but aesthetically moissanite is a poor choice to simulate the look of a diamond.

Moissanite color is similar to an average J-L color in diamonds with a distinct greenish-yellow overtone and double refraction and strong pleochroism which makes the identification process easy.

Recently a new process of manufacturing yielded white moissanite lacking yellow-green color. New, absolutely white moissanite is indeed a great diamond replacement.