FQ is Fu Qi jewelry.
Pt990: Also known as foot platinum jewelry, its platinum content is not less than 990‰ (990 ‰). Pt950: Its platinum content is not less than 950‰ (950 ‰). Platinum is soft, so if you want to set diamonds, you must alloy it. Even if 5% alloy is added, Pt can be hardened to meet the processing requirements.