ADK is a brand owned by adecon, and Pt999 stands for platinum, with a platinum content of 999‰. it is a natural white precious metal, commonly known as platinum. Only jewelry with platinum content above 850‰ can bear any of the following exclusive marks-platinum, platinum, platinum or platinum.

After marking, the following platinum purity (platinum content) must be indicated: platinum Pt900 (representing platinum content of 900‰), platinum Pt950 (representing platinum content of 950‰), all platinum Pt990 (representing platinum content of 990‰) and thousand platinum Pt999 (representing platinum content of 999‰). Identify this line and you can get a tiny logo.