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Lab created diamonds, also known as Synthetic diamonds, are grown in highly controlled laboratory environments using advanced technology. Our lab created diamonds have the same physical, chemical, and optical properties as mined diamonds. Since no mining is necessary to produce these gemstones, they are a responsible choice. Our lab diamonds are tested by an independent grading laboratory to confirm their lab created origin.
| 0.5 1.0 2.0 carat D E F G Color VVS VS SI Clarity Oval cut lab grown created diamond | |
| Brand | ZTSUPERHARD |
| Original | Henan, China |
| Shape | Round Brilliant |
| Weight | 0.001-3.00 carats |
| Color | D E F G H I J color |
| Clarity | VVS~SI |
| Size | 1.40-9.36 carats |
| Usage | Ring, Necklace, watch, earrings, bracelet ect |
| Sample Order | 1 carat |
| Type | Oval lab grown diamond,Oval diamond,Oval Lab created diamond |

ZTSUPERHARD goes above and beyond the current industry standards to offer diamonds that were selected for their responsible origins. Our mission is to cultivate a more compassionate, transparent, and sustainable jewelry industry.


It is cultivated by simulating the natural diamond growth environment, moving the natural diamond formation environment to the laboratory, and using high technology to make the diamond grow in the laboratory. Small diamond seeds are gradually grown with gravel-sized or flaky diamonds as seeds, and further grown into large rough diamond stone,finally polished into the shinning diamond as natural one.

| Lab created diamonds | Natural Diamond | |
| Whether is it real or not? | 100% | 100% |
| Is it eco-friendly? | 100% | Not at all |
| Where does it come from? | Produced by Laboratory | Founded in the mines |
| Can you customize it? | Yes | Maybe |
| Is child labor involved? | No | Maybe |
How long does it live? | Forever | Forever |
| Will the diamond's shine go away? | No | No |
| Which is more affordable? | Very cost effective | Expensive |
| Can the same quality be delivered in large quantity? | Yes, because it is manufactured in controlled conditions. | Can not be determined |
By chooseing a oval lab grown diamond versus an earth mined diamond you are reducing the harmful impact mining has on the environment and also give you the joy of owning a beautiful lustrous diamond.

Henan Zhongtu Superhard Material Co., Ltd. is located in Zhengzhou City, Henan Province, China. After 15 years of development and efforts, the company has developed into a large national enterprise integrating scientific research, production and international trading.
Zhongtu company has state-level enterprise technology center, enterprise post-doctoral research station, and has a number of core key technologies and independent intellectual property rights. Some of the products have reached the international advanced level and are national high-tech enterprises. The main products of Lab grown diamond series products are popular in Japan, the United States, Europe and other developed countries and Southeast Asian markets.

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