Amorphous Diamond Treatment
Asha is the only diamond simulant in the world that employs a patent pending form of "Amorphous Diamond" which is man-made and "composed of a multitude of tiny diamond crystals all aligned together*". These microscopic diamond crystals are infused into the Asha crystal through the Amorphous Diamond Treatment (ADT) process to give Asha an upper layer that is both simulant and man-made diamond (SP3 carbon bonds, the same carbon bonds as a diamond). To better describe how the hybrid stone is completed, it is called "Diamond Infused", as atomic force microscope analysis shows that the microscopic diamond crystals literally penetrate into the upper layers of the Asha crystal.

 
Asha in the diamond coating during the Amorphous Diamond Treatment
 
Here is the clean room with the diamond coating equipment

Independent Test Results of the Amorphous Diamond Treatment

Shown to the right are comparison photographs taken by the Brilliancescope™. Light views 3 and 4 on the right show how the addition of the Amorphous Diamond Treatment adds to the crispness and focus of the faceting, thus improving the brilliance to the eye.

CZ is made of thicker molecules than diamond so more light is impeded while passing through the stone. This pushes light from the non-visible spectrum into the visible spectrum. The first color the human eye can see is blue, and this is the reason many standard CZs have an awful bluish cast or haze. This bluish cast should not be confused with reflection, as an example: looking at a diamond or simulant in sunlight on a clear day and the stone looks blue simply because it is reflecting the blue of the sky.

The ADT of Asha help to filter out this additional light, giving it closer light return to that of a diamond.

Diamond-like Balance of Fire and Brilliance
CZ has less brilliance (white light return) than a diamond but more fire (colored light return). The ADT increases the white light return while toning down the colored light (see graphs below) giving the Asha a diamond-like luster and a beautiful balance of brilliance and fire.

Below are the Brilliancescope test results for the Round Asha H&A, a SuperbCert diamond (ideal cut diamond), and a conventional diamond which is normally cut to maximize finished weight vs. optimal beauty.

As you can see from the results, the optical properties of the Asha simulant are nearly identical to those of the ideal cut diamond, and are significantly better than the conventional diamond.

Asha H&A 1.00ct sample results (E, Flawless)


SuperbCert 1.09ct natural H&A diamond (D, Internally Flawless, $21,500)


Conventional Diamond*

(*Normally cut to maximize finished weight vs. optimal beauty)



The outer diamond surface hardness of the Asha is approximately 9.6 to 9.8 on the Mohs scale). Combined with the core of the Asha the ADT increases the hardness of the Asha simulant to slightly harder than that of a Sapphire (9.1 on the Mohs scale). This increases in hardness makes the Asha more scratch resistance and durable (or tough) compared to other simulants.

All ordinary CZ gemstones (see our Asha comparison article for a list of the more well known ordinary CZ sold on the internet including Diamond Nexus, Russian Brilliants, Signity, etc.) measure an 8.5 on the mohs scale (despite what they may claim on their respective websites). How does an 8.5 on the Mohs scale compare to the 9.1 of Asha? Using the Knoop idention hardness test which meausures the amount of force required to penetrate a substance (kilograms per millimeter squared), a cubic zirconia measures 1370 kg/mm2. A sapphire (Mohs scale of 9) measures 2000 kg/mm2. Therefore at 9.1 on the Mohs scale, the Asha is nearly twice as hard and scratch resistant compared to an ordinary CZ gemstone.

Standard CZ is somewhat porous. Skin oils, soap and dirt can stick to and be absorbed into the stone clouding and dulling its appearance with time. Asha’s ADT is non-porous (like a diamond), and with its coefficient of friction less than that of Teflon, non-stick, so skin oils, etc. can be easily cleaned away. This smoothness of the coating means dirt has less of an opportunity/ability to stick to it, reducing the frequency of cleaning needed to keep your Asha beautiful.

Below are photographs of a friction test performed on a CZ and on an ASHA diamond coated simulant. This test illustrates that the Asha has a lower coefficient of friction compared to a standard CZ. As you can see the contact angle of the drop on the uncoated CZ is 98.5 degrees (300% higher than the Asha). The drop clings to the surface of the CZ similar to the way a drop of water clings to glass. In contrast the contact angle of the ADT coated Asha is drastically lower at only 31.7 degrees. Therefore dirt, grime, hand oils, lotion, etc will stick less to the Asha because of the diamond coating, and your stone will remain much cleaner than an ordinary CZ.


Test performed by:  Future Digital Scientific Laboratories (March, 2007)

View Evidence of Asha's Amorphous Diamond Coating

Amorphous Diamond Treatment FAQs


Will Asha test positive on a diamond tester?

No, it will not. Even though the upper layer of Asha contains SP3 carbon diamond bonds (same carbon bonds as a genuine diamond) the non-diamond core does not have the same thermal conductivity. Therefore, the stone will test negative as a diamond.

Note that diamond testers simply measure *heat conductivity*, they do not actually detect the presence of "SP3 carbon, or diamond". Thus, traditional diamond testers are sometimes also fooled by colorless sapphire and Moissanite.

Will the amorphous diamond coating on the Asha come off?

Atomic force microscope testing has shown the amorphous diamond is literally infused into the upper layers of the substrate, making it more like an infusion process and less of an actual coating or layering. Amorphous diamond also has a much more flexible molecular structure than crystalline diamond, which greatly impedes chipping.
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