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What is Moissanite?
Moissanite came from the stars. In 1893, French scientist Henri Moissan discovered beautiful natural moissanite inside a meteor crater. Today, natural moissanite is exceptionally rare - significantly rarer than diamonds.
Over time, lab-created moissanite was developed from the same material. It is perfect for engagement jewelry as it is highly durable, extremely beautiful, and both sustainable and eco-friendly.
Why Choose Moissanite?
Moissanite is extremely clear, sparkly, virtually flawless - all at a very reasonable price. It is superior to diamonds in terms of brilliance and sparkle and is the second-hardest gemstone in the world. This makes it perfectly durable for everyday wear and can be passed down through generations.
Moissanite is truly the best fit for your modern love story.
Brilliance & Refraction
There is no stone on earth - natural or synthetic, that compares to the brilliance of moissanite. Moissanite is the world's most brilliant gemstone - meaning, it is exceptionally bright and sparkly!
Fire Dispersion
Moissanite measures at 2.4 times the fire of diamonds. This results in a beautifully iridescent sparkle. This fire can be either reduced or emphasized depending on the cut of the stone.
Clarity
All of our moissanite is graded at VVS+ or greater, meaning that it is free of any visible imperfections: virtually flawless. A clearer stone produces a brighter, more beautiful stone.
Durability & Hardness
Moissanite is the second hardest gemstone in the world - second only to diamonds! It is an extremely durable, scratch-resistant stone, making it perfect for everyday wear.
There is no stone on earth - natural or synthetic, that compares to the brilliance of moissanite.
Can you see the difference between
moissanites and diamonds?
It is not easy to tell diamonds apart from moissanites when simply looking with the naked eye.
Even to highly experienced jewelers, it can be very challenging to tell the difference without the use of specialized equipment. We have visited several jewelers who were surprised to learn that our moissanites were not actually diamonds. Only upon inspecting our stones closely, in specific lighting and with a magnifier, could they tell that they were not diamonds.
Our moissanite is expertly cut by artisans with over 15 years experience. The result is a beautiful, sparkly and clear stone. In reality, the vast majority of people would not be able to tell our moissanite apart from a diamond.
To get the most diamond-like look, we highly recommend you choose our classic round moissanite. It comes in a hearts & arrows cut, which is expertly cut to sparkle and shine very similarly to a diamond. It is beautiful!
What is
The Castlefield Cut™?
Castlefield Collection creates the most beautiful moissanite you'll ever see. Using only premium materials, our moissanite stones are cut to maximize their diamond-like clarity and sparkle - this is called the Castlefield Cut™. Even jewellers have a difficult time telling our moissanite apart from diamonds!
Affordable Luxury
Castlefield Collection was created as an answer to modern couples wanting a beautiful engagement ring at an affordable price. We want you to have your dream ring at down-to-earth prices.
This is all possible because moissanite has not been subject to the same extreme artificial inflation as diamonds. Rather, moissanite is priced very fairly! While moissanite out-performs diamonds in many aspects, it can be purchased at a fraction of the price.
At Castlefield Collection, you will be able to get the ring of your dreams using moissanite - without compromising on beauty, durability, quality or your financial stability.
Eco-Friendly & Socially Responsible
Natural diamonds come at a very high cost: not only to your wallet, but also to the environment and developing nations. At Castlefield Collection, you can have a beautiful, glittering engagement ring without the guilt.
Since moissanite is created in a lab, there is no need for the unethical and environmentally-destructive mining that takes place in the diamond industry. Rather than being taken from mines, our moissanite is lab-grown and is cut and polished by a small team of artisans.
By purchasing Castlefield Collection jewelry, you are supporting a small, woman-owned business and a team of skilled artisanal craftspeople. Your ring will be created with a high level of attention, love and care.
Natural Diamond Mining Facts:
- The CO2 emissions from global diamond mining over one year is equal to 1.5 million+ vehicles running for a full year. (via BDI)
- Water usage from one year of natural diamond mining is the equivalent of 5 months worth of water consumption for Kenya's entire population of ~41 million people. (via BDI)
- Diamond mines release toxins that are "environmentally and socially disastrous, causing irreversible degradation of sensitive habitat and human health impacts." (via The National Round Table on The Environment & The Economy)
- The average stone in a diamond engagement ring involves the removal and processing of 200 to 400 million times its volume of earth, destroying ecosystems. (via USGS.gov)
- Energy usage from one year of diamond mining equates to the annual energy consumption from over a million US households. (via BDI)
Diamond Vs. Moissanite
Carat Size Equivalents
Diamonds are measured by carat, which indicates their weight. However, moissanites do not weigh the same as diamonds - making it difficult to make exact comparisons between the carat weight of a diamond and the equivalent size of a moissanite.
Therefore, we highly recommend that you consider our stone measurements in millimeters when choosing your stone size, rather than going by carat weight.
Please see the below charts for comparisons between moissanite size (in mm) and the approximate equivalent diamond carat weight. Millimeter measurements are listed as length x width.
Note: We can cut any size moissanite for you - even if it's not listed in these charts!
Round
Round
| mm | Approximate Carat Equivalent |
|---|---|
| 5 x 5 | 0.5 |
| 5.5 x 5.5 | 0.63 |
| 6 x 6 | 0.8 |
| 6.5 x 6.5 | 1 |
| 7 x 7 | 1.2 |
| 7.5 x 7.5 | 1.5 |
| 8 x 8 | 2 |
| 8.5 x 8.5 | 2.5 |
| 9 x 9 | 3 |
| 9.5 x 9.5 | 3.5 |
| 10 x 10 | 4 |
| 10.5 x 10.5 | 4.5 |
| 11 x 11 | 4.9 |
Oval
Oval
| mm | Approximate Carat Equivalent |
|---|---|
| 7 x 5 | 0.9 |
| 8 x 6 | 1.5 |
| 9 x 6 | 1.8 |
| 9 x 6.5 | 1.9 |
| 9 x 7 | 2 |
| 9.5 x 7 | 2.25 |
| 10 x 7 | 2.5 |
| 10 x 7.5 | 2.75 |
| 10 x 8 | 3 |
| 10.5 x 8 | 3.25 |
| 11 x 8 | 3.5 |
| 11 x 8.5 | 3.9 |
| 11 x 9 | 4.2 |
| 12 x 9 | 5 |
| 12 x 10 | 5.8 |
| 13 x 10 | 6.5 |
Pear
Pear
| mm | Approximate Carat Equivalent |
|---|---|
| 7 x 5 | 0.77 |
| 8 x 5 | 1 |
| 9 x 6 | 1.5 |
| 9 x 7 | 1.8 |
| 10 x 7 | 2.1 |
| 10 x 8 | 2.5 |
| 11 x 7.5 | 2.7 |
| 11 x 8 | 3 |
| 12 x 8 | 3.2 |
| 12 x 8.5 | 3.8 |
| 12 x 9 | 4 |
| 13 x 9 | 4.7 |
| 14 x 9.5 | 5.6 |
Cushion
Cushion
| mm | Approximate Carat Equivalent |
|---|---|
| 5 x 5 | 0.6 |
| 5.5 x 5.5 | 0.8 |
| 6 x 6 | 1.1 |
| 6.5 x 6.5 | 1.3 |
| 7 x 7 | 1.7 |
| 7.5 x 7.5 | 2 |
| 8 x 8 | 2.4 |
| 8.5 x 8.5 | 3 |
| 9 x 9 | 3.3 |
| 9.5 x 9.5 | 4.2 |
| 10 x 10 | 5 |
Elongated Cushion
Elongated Cushion
| mm | Approximate Carat Equivalent |
|---|---|
| 7 x 6 | 1.3 |
| 8 x 6 | 1.6 |
| 8 x 6.5 | 1.8 |
| 8 x 7 | 2 |
| 8.5 x 7 | 2.2 |
| 9 x 7 | 2.4 |
| 9 x 7.5 | 2.5 |
| 9 x 8 | 2.6 |
| 9.5 x 8 | 2.9 |
| 10 x 8 | 3.2 |
| 10 x 9 | 3.6 |
| 11 x 9 | 5 |
| 11 x 10 | 5.7 |
| 12 x 9 | 5.7 |
| 12 x 10 | 6.5 |
Radiant
Radiant
| mm | Approximate Carat Equivalent |
|---|---|
| 6 x 4 | 0.7 |
| 7 x 5 | 1.2 |
| 8 x 6 | 1.8 |
| 9 x 6 | 2.3 |
| 9 x 7 | 2.7 |
| 10 x 7 | 3.3 |
| 10 x 8 | 3.9 |
| 11 x 8 | 4.8 |
| 11 x 9 | 5.3 |
| 11.5 x 9 | 5.6 |
| 12 x 9.5 | 6.2 |
| 12.5 x 9 | 6.1 |
| 12.5 x 10 | 7 |
Emerald
Emerald
| mm | Approximate Carat Equivalent |
|---|---|
| 6 x 4 | 0.7 |
| 6.5 x 5 | 1 |
| 7 x 5 | 1.2 |
| 7.5 x 5.5 | 1.5 |
| 8 x 6 | 1.8 |
| 8.5 x 6 | 2 |
| 9 x 6 | 2.3 |
| 9 x 7 | 2.7 |
| 9.5 x 7 | 3 |
| 10 x 7 | 3.3 |
| 10 x 8 | 3.9 |
| 11 x 8 | 4.8 |
| 11 x 9 | 5.3 |
Asscher
Asscher
| mm | Approximate Carat Equivalent |
|---|---|
| 5 x 5 | 0.6 |
| 5.5 x 5.5 | 0.8 |
| 6 x 6 | 1 |
| 6.5 x 6.5 | 1.3 |
| 7 x 7 | 1.5 |
| 7.5 x 7.5 | 2 |
| 8 x 8 | 2.5 |
| 8.5 x 8.5 | 3 |
| 9 x 9 | 3.5 |
| 9.5 x 9.5 | 4 |
| 10 x 10 | 5 |
Princess
Princess
| mm | Approximate Carat Equivalent |
|---|---|
| 5 x 5 | 0.6 |
| 5.5 x 5.5 | 0.8 |
| 6 x 6 | 1 |
| 6.5 x 6.5 | 1.3 |
| 7 x 7 | 1.5 |
| 7.5 x 7.5 | 2 |
| 8 x 8 | 2.5 |
| 8.5 x 8.5 | 3 |
| 9 x 9 | 3.5 |
| 9.5 x 9.5 | 4 |
| 10 x 10 | 5 |
Heart
Heart
| mm | Approximate Carat Equivalent |
|---|---|
| 6 x 6 | 0.8 |
| 6 x 7 | 1 |
| 6.5 x 6.5 | 1 |
| 7 x 7 | 1.2 |
| 7 x 8 | 1.4 |
| 7.5 x 6.5 | 1.2 |
| 7.5 x 7.5 | 1.4 |
| 8 x 8 | 1.9 |
| 8 x 9 | 2.3 |
| 8.5 x 8.5 | 2.3 |
| 8.5 x 9.5 | 2.6 |
| 9 x 9 | 2.6 |
| 9 x 10 | 3.1 |
| 9.5 x 9.5 | 3.1 |
| 10 x 10 | 3.5 |
Marquise
Marquise
| mm | Approximate Carat Equivalent |
|---|---|
| 8.2 x 4.3 | 0.5 |
| 10.2 x 5.3 | 1 |
| 11.7 x 6.1 | 1.5 |
| 12 x 6.5 | 1.8 |
| 13 x 6.8 | 2 |
| 13.3 x 7 | 2.3 |
| 13.77 x 7.25 | 2.5 |
| 14.25 x 7.5 | 2.75 |
| 15.2 x 8 | 3.25 |
| 15.7 x 8.25 | 3.5 |
| 16.15 x 8.5 | 4 |
| 17.1 x 9 | 4.5 |
Try our FREE
Stone Size Stickers
Not sure which stone shape or size will suit you best?
Use our stickers to try on a variety of stone shapes in a wide array of sizes! Then, you can be sure you're choosing the size that works best for your hand and finger size.
We'll even cover the shipping cost!
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