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How To Distinguish True And False Moissanite?

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Today, the moissanite diamond is widely known. It has been certified as the brightest gem by GIA American Gem Institute and is sought after by consumers. However, some illegal businesses, taking advantage of the popularity of “moissanite diamond,” have imitated Moissanite. With other materials and have also produced various kinds of fake identification certificates. Therefore, it is common to see that it is not easy to distinguish true and false Moissanite diamonds. The following is a detailed introduction of the characteristics of the true and false Moissanite.

Moissanite wholesale

There are mainly two Well-know companies about moissanite diamonds: Charles & Colvard company (CC) and QG.

1. It’s not difficult to distinguish the true and false American CC moissanite diamonds. All their moissanite diamonds are equipped with platinum cards. The main function of this platinum card is to prevent authenticity.

2. Moissanite diamond and diamond also have waist code. The waist code is visible, and even the logo is very detailed. You can see the waist code clearly with a 10x magnifying glass, which corresponds to the certificate (forged certificates are uniformly printed, but not corresponding); so does QG (low quality and economical price).

And the fake diamond will be blurred, even without waist size. Moreover, the American CC Moissanite diamond can issue GIA American Gem Institute’s authoritative appraisal certificate, but the fake Moissanite diamond can’t. Some dishonest merchants sell genuine American CC Moissanite diamonds. That’s right, but they will sell some Moissanite diamonds with poor scores or low cleanliness when they have high cleanliness. Therefore, it’s important to choose the brand.

Normal Moissanite diamond

Since the CC company’s patent expired in 2015, many domestic enterprises independently researched and developed. Usually has this situation. The surface of zircon is coated with moissanite film. There is a kind of coated zircon on the market, which is the most hidden and deceptive. It’s hard for people not in the industry to know. The coating method may pass the diamond test pen this month, and it will become white and foggy when the film falls off next month, so it will not pass the diamond test pen. If the moissanite coating, wearing a long time after the film fell off, will become zircon, zircon no fire color, the same light source is easy to compare. The cost of this coating process is only $2.

How to distinguish between true and false Moissanite?

1.Moissanite unique faceted edge double

Moissanite diamond has unique faceted edge ghosting, which is not found in other imitations (including diamonds). It is the main basis for identifying true and false moissanite diamonds. It is difficult for ordinary people to measure the specific gravity and hardness. A simple magnifying glass operation is still available. You can use the magnifying glass to observe the faceted edge ghosting of diamonds, which is also a relatively simple method to distinguish true and false diamonds.


In terms of fire, the moissanite diamond has a Mohs hardness of 9.25, which is only lower than that of South Africa diamond but higher than any other gem. Its high hardness makes it difficult to scratch and crack and can be preserved forever. It has a dispersion index of 0.104, a beam length of 2.4 times that of South Africa diamond, and a refractive index of 2.65, which is higher than that of South Africa diamond. Therefore, moissanite diamond is brighter and more brilliant than diamonds, and its fire color is more amazing and sparkling.


The hardness of moissanite diamond and diamond is high, so the cutting edges and lines are clear. The lack of hardness of imitation products leads to the difference of cutting products.

4.Facet edge double can again distinguish mosanite from diamond

The faceted edge ghost can distinguish the Moissanite from the diamond again. Natural diamond is a single refraction gem, so there is no way to see ghosting when you look at it with a magnifying glass. But moissanite diamond is a birefringent gem, the two-axis optical characteristics of moissanite stone. When you look at it from the crown’s kite facet to the bottom under 10 times magnifying glass, you can see ghosting.

5.Thermal conductivity meter test

Use the thermal conductivity meter test it, if there is a reaction, it is Moissanite or diamond; if there is no reaction, it is not both.

Thermal conductivity meter


When the test sample is placed on the reflectometer platform, the test stone’s reflectance will be converted into a value. The values of the reflectometer made in China, diamond, and Moissanite are 85-96 and 100-118, respectively.

7.Conductivity meter

Moissanite is a conductor, while most diamonds are insulators. Only a small amount of Ⅱ b natural blue diamond and synthetic diamond are conductors. Place the sample on the metal holder, hold the conductivity meter, and gently press the probe on the surface of the test stone. If it is a Moissanite diamond, the instrument will light yellow and red and give a warning.

8.The high carbon diamond imitating as a moissanite diamond.

What is a high carbon diamond? It’s a kind of zircon. Synthetic cubic zirconia looks like a diamond. After processing, its flicker is second only to that of the diamond. It’s an imitation of a diamond from the 1970s before Moissanite came out. It’s been so-called as “high carbon diamond” by some businesses. It’s a way of playing an information gap; buyers do not understand what this is. The concept is all fabricated by the seller. Some of the so-called high-carbon diamonds are top-notch, but they add another layer of coating. Generally, the top synthetic cubic zirconia price is about $1, which is quite different from $50 moissanite diamond.

All of the above are the ways to identify true and false diamonds as long as the artificial carbon-silicon crystal is a real Moissanite diamond. When the human eye is bad, it is more accurate to judge the gem according to the machine’s value. At present, the most traditional way to identify the true and false Moissanite diamond is the test pen. When you buy a Moissanite diamond, you should test if it can be passed the tester

The design of luxury Moissanite diamonds is various, and they’re always one of your styles. Our lab diamond factory provides Moissanite, which has a strong fire color. It is the best choice for lovers to enhance the overall wearing experience of diamond jewelry.

What are the grades of Moissan diamonds?

Then there is 4C, color, clarity, cutting, weight, and weight (carat number), each item in 4C has its level. The quality of moissanite diamonds is evaluated from four aspects (4C): carat, color, clarity, and cutting.

With the popularity of Moissanite diamonds, People’s concern for diamonds is unlimited to the true and false identification, but the quality classification of moissanite diamonds. Internationally, the 4C principle is usually adopted: carat weight: 1 carat is equal to 200 mg.

There are different levels of moissanite diamond. A good moissanite diamond depends on 4C: weight, color, clarity, and cutting.

Size comparison chart

Moissanite diamonds are sold by size, not weight. Because many consumers don’t know the size of Moissanite diamond, some businesses will add weight beside the size to see the weight of the specific size.


Color contrast diagram

The color of moissanite diamond is divided into D, e, F, G, h, I, J, K, l, m, N, O, P, Q, R, s, t, u, V, W, and X in turn.

D. E and F are colorless; G, h, I, and j are nearly colorless; K, l, and m are yellowish; N, O, P, Q, and R are light yellow; s, t, u, V, W, and X are yellow.

The color of moissanite diamond includes colorless, green, yellow, and gray, almost colorless—the more transparent colorless, the better the refraction and dispersion.


Clarity contrast chart

The classification of the cleanliness of Moissanite is as follows

Cleanliness class 1:

FL means that the Moissanite is clean when viewed under a 10 times gem magnifying glass. That is, there is no inclusion inside or outside the gem.

Cleanliness class 2:

It means that there is no defect inside the Moissanite when viewed under a 10 times gem magnifying glass. Still, there may be a slight defect on the surface, which RE polishes can remove.

Cleanliness class 3:

VVS refers to the tiny flaws in the pavilion or the appearance of Moissanite seen under a 10x gem magnifying glass. The difference between vvs1 and VVS2 is that the latter has little cotton spots and slight stubble.

Cleanliness class 4:

Vs. refers to a tiny defect in Moissanite e when viewed under a 10 times gem magnifying glass. The difference between VS1 and VS2 is that the latter may have small cotton spots or stubbles.

Cleanliness grade 5:

Si means that when you look at the Moissanite under a 10 times gem magnifying glass, you can easily see the defects, but you can’t see them with the naked eye.

Cleanliness grade 6:

P1, P2, and P3 refer to the small defects easily seen by the naked eye when the Moissanite is viewed under a 10 times gem magnifying glass. Some of them have obvious cleavage and cracks.


Cutting contrast diagram

The cutting of standard round drill is divided into five grades

Excellent, very good, good, fair, poor

A brilliant moissanite diamond is due to its unique high refractive index and high dispersion performance. The perfect cutting is also the key to show the charm of a moissanite diamond.

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