4 c's diamond chart,
diamond classification chart
good qiality shop acrylic 4C board identification plate standard diamond 4C card display
1. Material :acrylic
2. Size Customzied
3. Color Various
4. OEM&ODM : Warmly welcome custom jewelry box
5. Quality control Raw material purchase, pre-production machine testing, checking goods before shipment, packaging, etc.
6. Sample policy Sample charge will be returned to you after placing order.