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Diamond Vs CZ: Price, Hardness, Brilliance, and Dispersion Important Differences.

Diamond Vs CZ

Here in this blog, we are going to learn about Diamond Vs Cz, Most of us know about diamonds but how much do we know about CZ? Let’s learn about this rare but revolutionary Gemstone in detail.

Have you ever seen a diamond ring at the cheapest prices online and wondered wow a diamond ring at this price is unbelievable or diamond must be fake. Only very few know that Cubic Zirconias are diamond simulants. They are not diamonds but are just like diamonds.

No doubt diamonds are and will stay expensive and rare. There are many factors which make diamonds expensive and there is no stone or gem till now which can replace it.

Diamonds are girls best friends but did you hear about CZ? CZ or Cubic Zirconias are best friends for those who love to shine all the time. Well CZ is no more less than diamonds, If you are a jewelry lover and with changing fashion trends you like to change jewelry too then CZ is the best option for most of us.

In this blog, I will show you the difference between both of these gems but that doesn’t mean any of this lacks in properties. I will stay while stating the differences and I will say both gems are important for so many jewelers and jewelry industry.

Let’s start…


Diamond Vs CZ Discovery


Diamonds were first discovered in India around the 4th century BC. India once was the only source of diamonds to the world but not anymore.

Cubic Zirconia:

Cubic Zirconia was first discovered in 1832 but It didn’t had any value at that time. But in 1937 two German Scientists made an important discovery in the timeline of Cubic Zirconia which further in the 1980s came to known as the cheapest diamond simulant to use in jewelry.

Conclusion – Diamonds were discovered before Cubic Zirconia and still haven’t found any better replacement.


Diamond Vs Cubic Zirconia - Founder


Diamond got its name from the Greek word “Adamao” which means invincible or unbreakable. There is no founder of this gem known till now as it was used since ancient times.

Cubic Zirconia:

As mentioned in the previous point Cubic Zirconia doesn’t have any particular founder as several discoveries were made on CZ for many years but we can give credits to those 2 German Scientists due to which CZ gains much importance in its history. Hence its name was kept from its chemical name itself.

Conclusion – Diamonds are old and well used since ancient times while CZ is new and it has so much to offer to people in this competitive world. Tho Diamonds are Diamonds after all You have to earn it.

Thermal Conductivity

Diamond Vs Cubic Zirconia - Thermal conductivity power


When it comes to thermal conductivity no doubt Diamonds are prominent thermal conductors and fair electric insulators.

Cubic Zirconia:

While Cubic Zirconia is a thermal insulator.

Conclusion – Diamonds are thermal conductors while Cubic Zirconia is thermal insulator.

Heat Resistance

Diamond Vs Cubic Zirconia - Heat Resistance


A diamond needs to be heated at 800-degree Celcius to burn completely.

Cubic Zirconia:

To melt Cubic Zirconia it needs up to 2540 degrees Celsius of heat.

Conclusion – It needs more heat to burn CZ even though its not as hard as diamond.


Diamond Vs Cubic Zirconia - Hardness


Known as most hardest material on the planet diamonds hardness is 10 on Mohs scale, which makes them unbreakable.

Cubic zirconia:

Cubic zirconia has a hardness of 8 to 8.5 on the Mohs Scale fairly hard as diamond.

Conclusion – Diamond is hardest than Cubic Zirconia.


Diamond Vs Cubic Zirconia - Brilliance


On the refractive index, diamond stands at 2.42. Which means it reflects adequate light through it.

Cubic Zirconia:

Cz has pretty low brilliance as compared to diamonds it stands between 2.15 to 2.18  on refractive index.

Conclusion – Diamond has more brilliance than Cubic Zirconia on the refractive index

Fire (Dispersion)

Diamond Vs Cubic Zirconia - Fire (Dispersion)


While placed in light or in sunlight diamonds shows a 0.044 dispersion rate or fire.

Cubic Zirconia

When CZ comes in contact with sunlight or light it reflects an 0.066 dispersion rate or fire which is more in comparison with diamonds.

Conclusion – Cubic Zirconia reflects much fire or dispersion than diamonds.

Price $$

Diamond Vs CZ - Price difference


If you want to buy 1 Carat Oval Diamond with GIA Certification, VS1 Clarity and F Color then it will cost you around $4400 approx.

Cubic Zirconia

While in the case of Cubic Zirconia with the same properties will cost you only $20 hardly.

Conclusion – Cubic Zirconia is much cheaper than diamonds.

So its concluded that diamonds are better in some aspects but CZ has even won at many and most importantly on price. Maybe this is the reason why most of the jewelers across the globe are now using Cubic Zirconia instead of diamonds in their high-end jewelry collection.

I really hope at the end of this blog, you are not confused between Diamond and Cubic Zirconia. Also, as per my suggestion buying Cubic Zirconia jewelry won’t be an bad idea as it has its value too and that’s why it is called diamond simulant. Thanks to German Scientists and all those scientists who introduced this diamond simulant to the world. That’s all from Diamond Vs CZ.

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