Moissanite has exceptional hardness, ranking 9.5 on the Mohs scale, making it more durable than diamonds. Moissanite also has a high refractive index, resulting in superior brilliance and fire, which are often used to describe its optical excellence. Moissanite is also much more affordable than diamonds, costing significantly less, making it a popular choice for engagement rings and other luxury jewellery. The rarity and exclusivity associated with naturally occurring Moissanite contributes to its prestige and sophistication in the jewellery market.