Moissanite is a Silicon Carbide or Carborundum produced by C3 and Cree. Moissanite was first introduced to the jewelry market in 1998. Moissanite was named after French chemist Henri Moissan, who won the Nobel Prize in Chemistry in 1906 when he discovered a new mineral from Meteorite debris in a meteorite pit called the Barringer near Winslow, Arizona. Moissanite is found only in meteorites of iron-nickel and is classified as an element rather than a compound.
Moissanite has a Mohs hardness of 9.25, while diamond hardness is 10. Moissanite has a double refractive index and a refractive index of 2.65 to 2.69. The durability of Moissanite is exquisite. Colorless synthetic moissanite exhibits colorless diamonds, and it causes more difficulty in recognizing CZ (Cubic Zirconia).
How to spot Moissanite
Based on the Moissanite’s anisotropy (double refractive index), moissanite samples must be viewed to the sides to see the double image of the periphery. Diamond is isotropic (single refractive index) with a refractive index of 2.417. Moissanite has a refractive index of 2.670. So, the dispersion of moissanite is very high compared to cubic zirconia of 0.060 and the diamond of 0.044. Synthetic moissanite is electrically conductive and this is similar to diamond, so to distinguish which using a thermal tester will be ineffective.
Spot Moissanite with Optical Recognition of Hodgkinson
Alan Hodgkinson discovered the Hodgkinson method with the Gem-A around the mid-1970s. This method is used to identify the difference between natural diamonds and colorless and fake gemstones. Keep the table or crown very close to your eyes and glance; the light source uses a monochromatic light source (pen lamp, candlelight, etc.) in a dark room. The reflective model distinguishes the material from the other. Small, detailed, and sharp are focused on the pattern caused by the reflection seen when observing diamonds, which depends on the degree of refraction of light. With similar sharpness, larger details will be evident in Moissanite due to high refraction, while cubic zirconia will be more widespread, mainly due to the reflection of the bottom and the degree of fracture. Cubic Zirconia radiation is small.
Moissanite tester pen:
Test strips used to distinguish diamonds from diamond imitation stones or simple devices for Moissanite recognition may not be able to distinguish clearly between high-heat diamonds with black moissanite.