How to Test the Authenticity of Raw Black Diamond


Most people are used to standard synthetic diamonds. How about embracing a change to black diamonds? A raw black diamond, known as a natural black diamond, is an incredible product from cherished dame nature. The diamonds result from the integration of aggregate graphite and carbon, the source of their black shade.

The compounds in standard synthetic diamonds are the same as those in black diamonds. That is a clear indication that black diamonds are indeed natural. The stones have outstanding characteristics that set them apart from other diamonds. The increased demand for black diamonds has led to their market expansion. As the markets expand, there must be challenges like selling the counterfeit black diamond. On that account, there is a need for the diamond’s authenticity.

Distinguishing a Natural Black Diamond from a Fake

Counterfeits will try making a fake black diamond with all features that a real one has. That makes it difficult for most people to distinguish it just by seeing it. Experts in testing natural black diamond realness use a magnifying glass because they know what to look for. Apart from its imperfect structure, a natural black diamond will always have a rough surface with nicks and scratches when viewing it from a magnifying glass. However, from afar, the stone can look shiny. The standard colors for black diamonds range from black, dark green, dark brown, and colorless brown to olive green with an opaque appearance. There are various simple authenticity tests for those who are not experts in identifying authenticity by looking.

1. Waterdrop test

Testing whether your carbonado is real or fake using the Waterdrop test involves applying the stone’s high-density characteristic. All one must do is fill a glass with water and put the piece of diamond in the water. A natural diamond will sink in the water due to its high density, while a counterfeit will float.

2. Dot test

The refractive property of black diamonds is crucial in the dot test. Thus, make a dot on a piece of paper that contains no writing. With the flat surface of the stone on the dot, look through its pointed tip. One can see through the mark if the carbonado is fake. Usually, the raw black diamond will allow bouncing back of light when one exposes it to a light source, making it difficult to see the dot.

3. Fog test

The process of the fog test involves breathing a small amount of air into the black diamond while holding it. Since natural black diamonds conduct heat perfectly, the heat and moisture of an individual’s breath will lead to fogging on the diamond. However, a fake diamond might also form a fog, but the fog will take time before it disappears, while fog on an authentic diamond disappears immediately

4. Heat test

Black diamonds have high heat resistance characteristics. Therefore, when one applies heat to a real diamond and puts the diamond in a glass of water instantly after heating, it maintains its original structure. Otherwise, a fake black diamond will shatter, thus destroying its design.

5. Sparkle test

The sparkle test involves holding the carbonado into a light source and observing what happens. The actual diamond will reflect the light allowing the formation of colored beams. Counterfeit diamonds will bring out a dull reflection.


Testing natural black diamond authenticity involves carrying out straightforward procedures. Another tip that can give you perfect results is to cut the diamond. One will find it hard to cut through an authentic black diamond. Testing for a diamond’s realness is an excellent way of ensuring you get a product that perfectly serves its purpose.

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