It was first found inside a meteorite crater in the Arizona desert. Today it is one of the most popular choices for engagement rings and everyday sparkle. Moissanite is brighter and more fiery than diamond, nearly as hard, ethically created and a fraction of the price. No wonder so many people now call it the smart alternative to diamond.

If you are wondering whether moissanite is "real," how it compares to diamond, or whether it will last, this guide answers it all: what moissanite is, where it comes from, how it looks, how to choose it and how to care for it.

What Is Moissanite?

Moissanite is the gem form of silicon carbide (SiC). It is a real gemstone with its own crystal structure and properties. It is not a diamond, and it is not a glass or cubic zirconia imitation. Moissanite is a distinct mineral that happens to look strikingly similar to diamond.

On the Mohs hardness scale, moissanite rates 9.25, harder than every other gemstone except diamond (10). That makes it extremely resistant to scratches and well suited to rings worn every single day. It is also very tough and heat resistant, so it handles everyday knocks, cleaning and even jewelry repairs well.

A Gem From the Stars

In 1893, French chemist Henri Moissan was studying rock samples from the Canyon Diablo meteorite crater in Arizona. He found tiny, sparkling crystals that he first believed were diamonds. Years later he identified them as silicon carbide, and the new mineral was named moissanite in his honour.

Natural moissanite is so rare that it could never be used in jewelry. It has only been found in tiny amounts in meteorites and a few rock formations. It took about a century of research before scientists learned to grow large, clear, gem-quality moissanite crystals in the laboratory. Moissanite jewelry first reached the market in the late 1990s, and its popularity has grown ever since.

Is Moissanite Lab-Created?

Yes. All moissanite used in jewelry today is lab-created. The crystals are grown under carefully controlled conditions and then cut and polished by hand, exactly like a mined gem. Because no mining is involved, moissanite has a much smaller environmental footprint and is free from the ethical concerns that can come with mined stones. Lab-created does not mean fake: lab moissanite has the same chemistry and properties as the natural mineral.

Moissanite vs Diamond: How Do They Compare?

Brilliance and Fire

Moissanite has a higher refractive index than diamond (2.65 vs 2.42), which means it returns more light and shows more brilliance. It also has more than twice the fire (dispersion) of diamond, breaking light into flashes of rainbow colour. In bright sunlight, moissanite shows a lively, colourful sparkle that many people love.

Hardness and Durability

Diamond is a 10 on the Mohs scale and moissanite is 9.25. In daily life the difference is tiny. Both are far harder than anything you will normally knock them against, and both will keep their polish and sharp facet edges for generations.

Colour and Clarity

Modern moissanite is grown colourless, comparable to the D-F colour grades of diamond, and is typically eye-clean. Older or lower-grade moissanite could show a faint yellow or grey tint in certain light, but today's quality is consistently white and bright.

Weight and Size

Moissanite is about 10% lighter than diamond, so a moissanite of the same size weighs a little less. That is why moissanite is usually sold by millimetre size or "diamond equivalent weight." A 6.5 mm round moissanite looks like a 1 carat diamond but weighs about 0.9 ct. See our Gemstone Size Guide for full mm-to-carat charts.

Price

This is where moissanite truly shines. A moissanite costs a small fraction of a diamond of the same size, so you can choose a larger centre stone, a more detailed setting, or simply keep the savings for something else that matters.

Moissanite Meaning and Symbolism

Born from a meteorite, moissanite is often called the "stardust" gem. It is associated with clarity, new beginnings and lasting love, and its fiery sparkle stands for joy and optimism. Because moissanite is created without mining, many people also choose it as a symbol of conscious, values-led love.

At Topsy Jewels, moissanite is our choice for April birthstone jewelry, offering the icy white brilliance of the traditional April diamond in an ethical, affordable form. It is also the sparkling accent stone in many of our halo and pavé designs.

How to Choose Moissanite Jewelry

• Choose by size in millimetres. Decide how big you want the stone to look, then pick the mm size. For engagement rings, 6–8 mm is the most popular range.
• Pick your shape. Round brilliants show the most fire. Oval and pear look larger for their size and lengthen the finger. Cushion and emerald cuts give a vintage feel.
• Match the metal. White gold and sterling silver make moissanite look icy and bright; yellow and rose gold add warmth and contrast.
• Consider a halo. A halo of small moissanites makes the centre stone look larger and adds extra sparkle.
• Buy from a clear, honest seller. The listing should say plainly that the stone is lab-created moissanite.

Shop our moissanite jewelry collection, including moissanite rings, moissanite necklaces and moissanite earrings, or explore engagement rings and April birthstone jewelry. Every piece is handcrafted in 925 sterling silver with 18K gold vermeil options.

Caring for Your Moissanite Jewelry

• Clean with warm water, a little mild dish soap and a soft toothbrush, then rinse and dry with a lint-free cloth.
• Moissanite is safe in ultrasonic and steam cleaners, though the metal setting should be checked first.
• Oils and lotions can dull the sparkle; a quick clean brings it straight back.
• Store pieces separately so harder stones do not scratch softer gems or metal.
• Have prongs checked once a year to keep the stone secure.

Frequently Asked Questions About Moissanite

Q: Is moissanite a real gemstone?

Yes. Moissanite is a real gemstone (silicon carbide) with its own crystal structure and properties. It is not a diamond and not an imitation like glass or cubic zirconia.

Q: Can people tell moissanite from diamond?

To the naked eye, most people cannot. Up close, moissanite shows more rainbow fire, especially in sunlight. A jeweler can tell them apart with a special moissanite tester or by looking for double refraction under magnification.

Q: Does moissanite get cloudy or change colour?

No. Moissanite will not turn cloudy or lose its sparkle over time. If it looks dull, it simply needs cleaning to remove oils and dirt.

Q: Is moissanite good for an engagement ring?

Very much so. With a hardness of 9.25 and excellent toughness, moissanite is ideal for rings worn every day, and it lets you choose a larger, brighter stone for your budget.

Q: Is moissanite better than cubic zirconia?

Yes. Cubic zirconia is much softer (8–8.5), scratches and clouds over time, and is far less brilliant. Moissanite keeps its fire and polish for a lifetime.

Q: What is the April birthstone?

The traditional April birthstone is diamond. Moissanite offers the same icy white sparkle at a much more accessible price, which is why we use it for our April birthstone collection.

Final Thoughts

Moissanite began as stardust in a meteorite crater and has become one of the most loved stones in modern jewelry. Brilliant, durable, ethical and affordable, it lets you choose the size and style you truly want without compromise. Whether for an engagement ring, an April birthday or everyday sparkle, moissanite is a gem made to be worn and enjoyed for life.