Lab-Created Diamonds, also known as synthetic diamonds, are man-made but are chemically identical to naturally occurring diamonds. They are produced through high-pressure and high-temperature (HPHT) or chemical vapor deposition (CVD) processes. These techniques ensure that lab-created diamonds, also known as diamonds, share the same chemical composition and properties as their natural counterparts, making them virtually indistinguishable from mined diamonds.

Physical Properties

Hardness

Lab-Created Diamonds are the hardest naturally occurring substance known to man, with a Mohs hardness rating of 10. This makes them highly resistant to scratching, ensuring a longer-lasting and durable gemstone.

Moissanite, while not as hard as lab-created diamonds, is still an exceptionally hard material, with a Mohs hardness rating of 9.25. This makes it highly resistant to scratches and abrasions but slightly softer than diamonds, which means it may chip or crack under extreme stress.

Refractive Index (RI) and Brilliance

Moissanite exhibits a higher refractive index (2.65-2.69) than lab-created diamonds (2.42). This higher RI means that moissanite bends light more, giving it a broader definition of brilliance and resulting in more perceived sparkle. The high RI also contributes to moissanite's fire and scintillation, making it a popular choice for those seeking a dazzling appearance.

Lab-created diamonds, while not as highly refractive as moissanite, still showcase a unique brilliance and fire due to their excellent cutting techniques. Different cutting styles can enhance the diamond's optical properties, creating a stunning effect.

Toughness

Lab-created diamonds are known for their remarkable toughness and durability. Despite their hardness, they can withstand impacts and high-pressure conditions without chipping or cracking.

Moissanite, although slightly harder than lab-created diamonds, is more brittle and may chip or crack under stress. This makes it less resistant to impact compared to lab-created diamonds, though it is still a strong and durable gemstone.

Color and Clarity

Lab-Created Diamonds are typically found in a wide range of colors, from colorless to various shades of yellow or brown. They are generally graded based on their clarity, with fewer natural inclusions making them more valuable.

Moissanite may sometimes exhibit a slightly yellowish or greenish hue under artificial or low light conditions. However, due to its structure, moissanite tends to be clearer and more free from inclusions than lab-created diamonds.

Cost and Value

Given their rarity and the costs associated with diamond mining, lab-created diamonds are generally more expensive than moissanite. High clarity and color grades can significantly increase the cost of lab-created diamonds.

In contrast, moissanite is much more affordable, making it a cost-effective alternative for those seeking a similar appearance at a lower price point. Many people opt for moissanite when looking for a similar look without the high cost associated with lab-created diamonds.

Conclusion

While both moissanite and lab-created diamonds are impressive gemstones, they differ in several key aspects. Moissanite, with its silicon carbide composition, offers a higher refractive index and a broader definition of brilliance. However, lab-created diamonds are the hardest known material and have their own unique qualities and durability.

If you are in the market for a gemstone that closely resembles a diamond but within a lower price range, moissanite is a viable and stunning alternative. It is essential to understand the differences between these two gemstones to make the best choice for your jewelry.