A fake diamond will have rainbow colors that you can see inside the diamond. “People have a misconception that diamonds sparkle like a rainbow, but they don't,” Hirsch said. “They do sparkle, but it's more of a gray color.
Most synthetic diamonds look too good to be true all due to their extreme brilliance. Does your stone look really bright with lots of rainbow reflected colors? If so, it's most likely cubic zirconia. Yes, real diamonds are brilliant, but they are much more subtle than synthetics.
Lab grown diamonds are as real as diamonds mined from the earth. Lab grown diamonds are identical to earth mined diamonds in every way, except that they are grown in a lab. They have the same chemical, physical, and optical properties as mined diamonds and exhibit the same fire, scintillation, and sparkle.
Diamond simulants including CZ can dull up quickly if their backs get dirty. As with all jewelry care is important. Any gemstone will look dull or dirty over time if it is not maintained and cleaned.
Most diamonds will reveal blue florescence under a black light; therefore, you'll see a medium to strong color of blue, which means the diamond is real. If you don't see the blue color and instead see a slight green, yellow or gray fluorescence then this usually indicates the gem is not a real diamond.
A real diamond appears gray and white inside (brilliance) when held to the light and can reflect rainbow colors (fire) onto other surfaces. A fake diamond will display rainbow colors within the stone when held up to light.
The first step is to check for any inclusion on the stone with your bare eyes. If you're unable to see any inclusions with your bare eyes, then use a magnifying glass of at least 10X magnification to find out if the gemstone contains any inclusions. If you found any, then they are real gemstones.
First, soak your CZ jewelry in warm water and detergent and let it sit for at least 2 minutes. Then use a soft-bristled toothbrush or a cosmetic brush to scrub the jewelry piece until an even sparkle reappears. Remember to rinse and dry the jewelry piece thoroughly to avoid leaving a cloudy residue on your jewelry.
If your stone fogs up quite a bit and takes time for the condensation to evaporate, then it is most likely fake. Real diamonds do fog up, but only a little and the condensation evaporates quickly.
Artificial diamonds have certain inclusions that are not clear even under a loupe. Jewelers and gemologists use special equipment to determine a diamond's origin. But, some lab-grown diamonds have inclusions that may appear under a loupe. If you need a lot of training to discern between the two.
Introduction. When an object is so desirable, particularly when it can be sold for such a high price, there are always likely to be vendors seeking to imitate the item and sell it as an authentic piece. This means that diamond jewelry is often imitated and sold as a real diamond.
A dirty stone doesn't sparkle because light simply can't enter the diamond and causes it to appear dull. So, if you notice your diamond jewelry getting cloudier overtime, it's likely due to a dirty surface and there's an easy fix to restore their luster.
Reflection Color: Because of the refraction index of diamond, the reflection and sparkles within the stone should be in shades of gray.
Natural sunlight, UV light or even LED and Flores can't will make the diamond light reflect an array of colors. With the amount of sophistication these days, there is not much noticeable difference in sparkle between a fake diamond and a real diamond.
Cubic Zirconia
They're so commonly used as a diamond look-a-like that many people will cite that all non-naturally occurring diamonds are fake diamonds are called cubic zirconias. Cubic zirconia is a lab-made synthetic substance composed of zirconium dioxide.
Moissanite Arguably the best faux diamond in existence, moissanite comprises silicon carbide, which means it is almost of the same hardness as a natural diamond. It also has reasonable colorlessness, although the glow is far more colorful than what you would see in a real diamond.
A diamond that has not been cleaned for a while can look milky due to a buildup of film and dirt on its facets. Cloudy diamonds can also have diminished transparency from inclusions or other characteristics intrinsic to the crystal from which they are cut.
Although some Lab-grown diamonds can fade, this happens only if the quality of the diamond is cheap. In such a case, they lose their shine due to overexposure to UV light. One reason why lab-created diamonds don't lose their shine or get faded and cloudy with time is that they are created by a process called HPHT.
Diamonds gain their characteristic sparkle by using lasers to scrape away their dull, rough outer surface and create and polish angled facets that allow them to sparkle.
Toothpaste and an old toothbrush or Q-tip.
Once the jewelry has a thin coating, brush clean — working into the crevices — with the toothbrush. This is a great option because the slightly gritty texture of the toothpaste works hard to remove even the toughest dirt. Rinse with cool water and buff dry with a clean cloth.
The Density Test Real diamonds are incredibly dense, and often outmatch the fakes in density tests. To confirm this, fill a glass up with water and drop your diamond in. A fake diamond will most likely float on top or only sink to the middle while a real diamond will sink to the bottom thanks to its density.
At the end of the day, only a jeweler will be able to identify a real gemstone with 100% certainty. These professionals are highly trained to understand the small nuances that distinguish a real stone from a fake one and will therefore be able to guarantee your stone's authenticity.
Fake diamonds do not reflect spectral rays from the beam of the flashlight. This is because a diamond's refractive index is high; it makes the white light entering the diamond split into multiple colors before it exits on the other side of the stone.
As straightforward as it sounds, fill a glass of water at home to roughly three-quarters full. Separate the stone so that it is loose, and drop it into the water. Diamonds are highly dense and a genuine gem will sink to the bottom – every time. If it hovers to the surface or only partially sinks, then it is a replica.
On the other hand, raw diamonds are uncut and unpolished. In other words, they have not been altered or tampered with after they were discovered. Raw diamonds look like transparent stones with yellowish or brownish tints. There are some that are colorless but these are rare.