Hualien County is an opal processing base. Hualien has a yellow-green opal ring, which has the advantages of cat's eyes. The identity of Taiwan Province Province and the mainland is different. As long as Hetian jade is appraised on the mainland certificate, it is a high-end product. The opal tremolite in Taiwan Province Province and mainland China is above 65%. One or two thousand products should be average.

All jewelry appraisal centers in Hangzhou can issue appraisal certificates. What are the main materials and what are the benefits?