Thinking about moissanite? Here are honest answers to the questions we hear most. For the basics, start with what is moissanite.
Does moissanite pass a diamond tester?
Often, yes, on a basic tester. Many standard diamond testers measure how fast a stone conducts heat. Moissanite conducts heat in a similar way to diamond, so these testers can read it as diamond. Testers that also measure electrical conductivity (often called multi-testers or moissanite testers) can tell the two apart, and a gem lab can always identify moissanite. Moissanite is its own gemstone and should never be sold as a diamond.
Is moissanite a fake diamond?
No. Moissanite is not a diamond and does not pretend to be one. It is a separate gemstone made of silicon carbide, while diamond is carbon. It is used as a diamond alternative because it looks similar, but it has its own properties, including more colorful sparkle (fire) than diamond. Cubic zirconia and glass are much softer and less brilliant. See moissanite vs lab diamond vs cubic zirconia.
Does moissanite get cloudy?
The stone itself does not turn cloudy over time. Moissanite is very hard (9.25 on the Mohs scale) and does not absorb water or oils. If a moissanite looks dull or cloudy, it is almost always a film of lotion, soap, skin oil or dust on the surface. A simple clean brings the sparkle back.
Does moissanite tarnish?
The moissanite stone does not tarnish. The metal around it is a different story: sterling silver can tarnish when exposed to air, moisture and chemicals, and plating can wear over time with heavy use. To keep plated silver jewelry looking its best, take it off before swimming, showering, cleaning or the gym, put on perfume and lotion before your jewelry, and store each piece in a dry pouch or box.
How do you clean moissanite?
- Soak the piece for a few minutes in warm water with a drop of mild dish soap.
- Gently brush the stone and setting with a soft toothbrush, paying attention to the back of the stone where oils build up.
- Rinse in clean water and pat dry with a soft, lint-free cloth.
Avoid bleach, harsh chemicals and abrasive polishes, which can damage plating. More tips in our jewelry care guide.
Is moissanite expensive?
Compared with diamond, no. Moissanite usually costs a small fraction of a mined diamond of the same size, and less than most lab-grown diamonds. That is why many people choose a bigger center stone, such as 2 or 3 carats, for the price of a much smaller diamond.
How much is moissanite per carat?
There is no single price per carat. It depends on the stone's size, cut, color grade and clarity, and on the metal and setting it comes in. Unlike diamond, moissanite prices do not jump steeply as the carat weight goes up. For example, our classic solitaire ring comes in 1, 2, 3 and 5 carats, and you can compare the price of each size on the product page.
Is moissanite good for an engagement or promise ring?
Yes. Its hardness makes it suitable for everyday wear, and its brilliance makes it a popular choice for engagement and promise rings. Browse moissanite rings and promise rings for her.
