Henan authoritative diamond appraisal center address
He' nan province jewellery jade quality inspection station
No.328, Longhai West Road, Zhengzhou
He' nan province gold and silver jewellery quality supervision and inspection office
No.28 Jinshui Road, Zhengzhou City
Or you can also search for identification through related websites on the Internet, which is the same. Zakaly Jewelry provides professional diamond identification skills.