Shenzhen OCT -loft Gem Art Salon can help you identify, and the identification is free. But if you need to issue a certificate, you need to go to the national authority. Gem Art Salon can do it for you. The fees are subject to the fees charged by the appraisal center, generally around 10-30 yuan. Of course, you can also go to the local appraisal center for your own appraisal, but the appraisal fee may be a little more expensive. The appraisal centers in Shenzhen are:

National Jewellery and Jade Quality Supervision and Inspection Center (Shenzhen)

Address: 4th Floor, Investment Building, No.4009 Shennan Avenue

Tel: 0755-829 12709

China Geo University Jewellery Testing Center Shenzhen Shuibei Testing Station

Address: Zone E, Floor 2, Shuibei Jade Wholesale Market, No.71Beili North Road, Luohu District, Shenzhen

Tel: 0755-25633295