This is a lab grown, Dichroic Moissanite

Moissanite is a gemstone that is often used as a diamond alternative in jewelry. It is composed of silicon carbide and is known for its brilliance and sparkle, which are similar to those of a diamond. Moissanite was first discovered in 1893 by French chemist Henri Moissan, who found it in a meteorite crater in Arizona. It is extremely rare in nature, so most moissanite used in jewelry is created in a laboratory.

Moissanite has a hardness rating of 9.25 on the Mohs scale, making it one of the hardest known substances, second only to diamond, which has a hardness of 10. This high hardness makes moissanite very durable and resistant to scratching, making it suitable for everyday wear.

Moissanite has a refractive index(brightness) from 2.65 – 2.69, which is higher than a diamond.

One of the primary reasons people choose moissanite over diamonds is its cost. Moissanite is generally less expensive than diamonds of similar size and quality, making it an attractive option for those looking for a beautiful and durable gemstone without the high price tag associated with diamonds.

Moissanite is available in various shapes and sizes and colours, and it can be used in various types of jewelry, such as engagement rings, earrings, and necklaces. Its excellent optical properties, including its fire and brilliance, make it a popular choice for those who want a gemstone that closely resembles a diamond.