What does MS66 mean on jewelry?

MS66 is a grading designation used primarily for coins, indicating a high level of quality and preservation. However, when referenced in jewelry, it may denote the quality of gemstones or materials used, suggesting that they are of Excellent clarity and minimal imperfections. The "MS" typically stands for "Mint State," while the number reflects the specific grading within that category. Always check the context to ensure the grading applies appropriately to the jewelry in question.