Yinwnag Industrial Co., Ltd. loated in zhengzhou city of Henan Province. Our main products include :1. Rough Lab Grown Diamond ( white and yellow color)2. Polished Lab Grown Diamond3. HPHT Diamond Plate4. Diamond wheelsAdhering to the motto of "build the business on mutual trust and benefit", we endeavor to provide our customers with reliable products, comprehensive service and rewarding return.We welcome customers, business associations and friends from all parts of the world to contact us and seek cooperation for mutual benefits.
