1. Look at the selection of materials: For crystal products with well-selected materials, there should be no gas-liquid inclusions distributed in the form of stars, 雲と群れ. 質感は純正です, 光沢のある, そしてクリスタルクリア. 深さの異なる亀裂や斑点がある場合, 欠陥品です. 2. Regarding workmanship: There [...]
