Moissanite is a white silicone carbide based stone that is commonly associated with the synthetic variation that has now become a popular substitute of the diamond. However it is no diamond simulant.
It surpasses a diamond in both fire and brilliance. It’s one of the hardest known substances, as it is extremely resistant to scratching, chipping and breaking. Unlike other diamond alternatives that can cloud and dull with time, Moissanite is just as atomically stable as a diamond and so its impossible for it to change color or lose its optical properties with time.
In fact, given that Moissanite is more heat resistant than diamond, it can be argued its even more atomically stable.