Physical Properties of Moissanite-FU RONG GEMS
Moissanite's brilliance outshines every gemstone, but its exceptional durability is truly remarkable to say the least. Moissanite is a gemstone that will endure for generations and beyond.
Durability consists of hardness, toughness and stability.
The ability of a gemstone to remain intact, withstand force (pressure) and resist breaking or chipping is known as toughness. Determined by a substance's atomic and chemical structure, toughness can vary directly within a gemstone. While both Moissanite and diamond are rated excellent in toughness, Moissanite has a different atomic structure than diamond which does not have a direction of cleavage (which sometimes is considered as a direction of structural weakness) like diamond. Simply said, Moissanite outranks diamond in overall toughness.
withstand temperature variations during the jewelry manufacturing process and repairs at a jeweler's bench (unlike other gemstones
such as cubic zirconia stones or emerald). In fact, Moissanite has a higher vaporization temperature than diamond and can withstand
temperatures reaching 2,000 degrees Fahrenheit.
Moissanite is also very stable when exposed to various chemicals, solutions and acids typically used during both manufacturing and jewelry repair that commonly damage other less stable gemstones.
Moissanite ranks 9.25 on the Mohs scale making Moissanite one of the hardest gemstones on earth. It's unusually high hardness makes scratching and abrasions very rare, even after many years of daily wear and tear.
Moissanite's ability to resist abrasion and scratching easily outranks and is more than double (120%) the hardness of any popular diamond simulants such as Diamond Nexus (CZ), Russian Brilliants (CZ), or Sona Diamond (CZ).
Clarity is a measure of the surface blemishes and internal inclusions of a gemstone. For the purpose of comparison to natural diamonds, experts agree the clarity of Moissanite is on average the equivalent to VS clarity on the GIA scale.
What this means in reality is inclusions can only be seen under magnification, and under a jewelers loupe (10x magnification) are difficult to see. Less than 10% of faceted diamonds have this level of clarity.
Moissanite has a property known as double refraction. When a ray of light passes through the gemstone it is slowed, bent and split in two. Sapphire is a doubly refractive material as well, as are peridot, tourmaline and zircon. To some degree it is this property that gives Moissanite its amazing fire. However it is often cited by critics of Moissanite, typically by companies who sell CZ, as a disadvantage, claiming that the double refraction will make the stone appear blurry. What they don't say is that every double refractive gem has at least one direction in which the material behaves like a singly refractive gem. This is referred to as the optic axis, and does not break light into two rays.
Moissanite is cut so that this direction of single refraction is though the table. This means that the doubling is not apparent when the stone is viewed though the table (top of the stone). Moissanite must be viewed at 10x magnification (jewelers loupe) through any other crown facet (e.g. star, or bezel) to see the doubling. Most of our customers do not know or realize that Moissanite is double refractive, and we provide this explanation and images to explain that, although it is a unique property of Moissanite, it does not negatively effect its beauty.