- sterling silver 925;
- moissanite stone.
 
Moissanite is the second hardest to diamonds on the Mohs hardness scale. Based on rankings from one to 10, diamonds are a 10 and moissanite is a 9.25-9.5.
Moissanite is a very durable option for an engagement ring stone, especially since the material doesn't scratch easily.
As Moissanite is grown in a laboratory, they do not have the usual cost of digging, shipping and the discovery of a common mineral diamond. So, the Moissanite jewelry cost less per carat than a diamond jewelry. This means a lot of bang for your money.
Unlike fake diamonds and various other gems, moissanite is likewise an effective conductor of heat. Therefore, when using a diamond tester that discovers thermal conductivity, moissanite will certainly pass as a diamond.