Wuzhou Changsheng Gems Co., Ltd
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Contact Us

Name: Charles Lin
Tel: +86-774-2536746
Fax: +86-774-3829768
Mobile: +86-18677422589
E-mail: sales@cs-gems.com
Add: No.114 Longgu Road, Wuzhou City, Guangxi Province, China

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Q: What is Cubic Zirconia?


Cubic Zirconia (or CZ) is zirconium oxide (ZrO2 ), is widely synthesized for use as a diamond simulant and it is a lab made created stone with a specific gravity of between 5.6-6.00 and at about 8.5 hardness on Mohs scale, which is harder than most natural gems. Its refractive index is high at 2.15 - 2.18 (B-G interval) and its luster is very good. Its dispersion is very high at 0.058 - 0.066, exceeding that of diamond (0.044).


Q: Cubic Zirconia (CZ) vs. Natural Diamond


Cubic zirconia (CZ) is so optically close to diamond that only a trained eye can easily differentiate the two. There are a few key features of CZ which distinguish it from diamond, some observable only under the microscope or loupe. For example:


Dispersion: With a dispersive power greater than diamond (0.066 vs. 0.044) the more prismatic fire of CZ can be seen by even an untrained eye.


Hardness: CZ has an 8.5 on the Mohs Hardness Scale vs. a rating of 10 for diamonds. Meaning CZ can only be scratched by sapphires or diamonds.


Specific gravity: CZs are heavyweights in comparison to diamonds; a CZ will weigh about 1.7 times more than a diamond of equivalent size. Obviously, this difference is only useful when examining loose stones.


Flaws: Contemporary production of cubic zirconia is virtually flawless.  Whereas most diamonds have some sort of defect, be it a feather, included crystal, or perhaps a remnant of an original crystal face (e.g. trigons).


Q: What is Synthetic Stones?


Synthetic gemstones are grown in a laboratory instead of being formed in the ground by nature. They are physically and chemically identical to natural-grown gems but cost much less to produce and to buy.


Just like natural gems, synthetics vary tremendously in quality and it takes several months to create a batch of gems.  Using low-quality processes, synthetic sapphires and rubies can be created for less than a dollar a carat, whereas high-quality synthetics can cost a hundred times more to create and sell for several hundred dollars a carat at retail.


Q: What is Hydrothermal Method?


High quality emerald, as well as the less common aquamarine, morganite, and beryl, can be lab grown by the hydrothermal method. It uses a water solution at very high temperature and pressure and takes several months to create a batch of gems.  Thats one of the reasons higher quality created gems cost so much more.


Q: What is your payment terms?


We accept payment in the following forms:


1) We accept payment via "Western Union" and "MoneyGram"

2) We accept payment via "Wire Transfer" to Company Account

3) We accept payment via "Wire Transfer" to Private Account


Q: What is your Guarantee and Refund Policy?


We are sure that you will be happy with the quality of our gems. However if you are unhappy with your order for any reason, you can cancel it and recieve a full refund within 7 days of recieving your order. You must return the gems in the condition that they were sent in and you are responsible for returning them and paying for the return postage. Please make contact within 7 days of receiving your order if you would like to cancel your order.


We never refund for Custom Made Gems for it is especially made and cut for you.Please place a Sample Order first to see the cut and justify the quality before placing bulk orders to avoid any dispute and misunderstanding between both parties. Postage will not be refunded.


Q: Can I get the Free Sample Before Order?


It’s understandable for us to arrange sample for your quality evaluation before placing orders/ trial orders for the first cooperation.


Normally, sample value not too much or there’re few samples, that will be free of charge. But, you have to pay the freight cost—this is our sample policy. As there are too many customers demand for samples, it would be a heavy cost if we pay all the freight charges for every customer. Therefore, hope you could understand.


As a courtesy, we’ll refund freight cost to you after you place the order (Depends on the quantities you buy).


DHL/EMS/Ups/FedEx express/TNT for your choice. Also you can tell us your courier account.


Q: How Loose Cubic Zirconia Quality is Determined?


There are 3 factors that affect the quality of Cubic Zirconia:

1) Purity Of Rough Material

2) Cutting Technique

3) Polishing Technique


Please email us: sales@cs-gems.com for more questions.