Prime among them is Moissanite. One of the more current of the engineered precious stones, moissanite, is as a matter of fact a normally happening item, and it is in this manner questionable whether it is a manufactured jewel or simply a gems stone which is exceptionally near jewel in it's characteristics. It was first found in quite a while in a meteor that arrived in Arizona in 1893. It was found by Dr Henry Moissan, after whom it was named. It has just been as of late delivered artificially, in light of the fact that it doesn't happen in adequate amounts normally to be financially practical, so it was important to devise a method for orchestrating if it somehow managed to be accessible in gems.
Moissanite is very near precious stone in it's normal characteristics. Though jewel is the hardest of the multitude of gems, rating at 10 on the hardness scale, moissanite isn't a long ways behind at 9.25, and harder than other regular gems stones like ruby (9) and sapphire (9) or emerald (7.5)
There are other relative scales used to rate adornments stones. In brightness, which is a proportion of it's refractive record, precious stone is 2.42. Moissanite at 2.65 is better than precious stones, and far beats ruby and sapphire at 1.77 and emerald at 1.58