Henan gold and silver jewelry quality supervision and inspection station. According to Baidu map, Henan Gold and Silver Jewelry Quality Supervision and Inspection Station is located in Jinshui Road, Jinshui District, Zhengzhou City, Henan Province, 0/54.2 km away from Luohe/KLOC. Henan Gold and Silver Jewelry Quality Supervision and Inspection Station is mainly engaged in rapid nondestructive inspection and arbitration inspection of precious metal jewelry and raw materials, rapid nondestructive inspection of jewelry and jade, and nondestructive identification and classification of diamonds.