Zhengzhou Sino Crystal Diamond Company Limited

Zhengzhou Sino Crystal Diamond Company Limited has been operating since 2004, giving it nearly two decades of experience in the diamond trade — a long track record that suggests stability and familiarity with market demands. Being headquartered in China positions it near major diamond processing and distribution centers, which can reduce logistics costs and improve supply chain efficiency. The company specializes in loose diamonds, a key product for jewelry manufacturers and resellers seeking raw materials without cutting or polishing. However, none of its verification details — including documents, work email, phone, or account email — have been confirmed. This lack of verification raises a red flag for buyers, as it makes it harder to verify the company's legitimacy, especially when dealing with high-value, high-risk products like diamonds. Buyers should request additional proof, such as a business license or a sample certificate, before placing any large orders.