You said they are legit, does that mean you have them tested by an independent lab? I know that almost all shops in China (and India) show nice certificates for

You said they are legit, does that mean you have them tested by an independent lab? I know that almost all shops in China (and India) show nice certificates for such purchases. But I also know from experience that many of these certificates are worthless as rubber stamps. Maybe you live in China and know more about such things? I'm thinking about buying and would like to know more from your perspective. Thanks!