WILL THE CRYSTALS HURT WHEN I SIT OR WEAR THEM UNDERNEATH MY CLOTHES?

No. They're quite comfortable and barely feel like you're wearing them at all.  Each design has been personally wear-tested by us for comfort, functionality and durability before they are released to the public. We do recommend, however, to avoid sitting directly on hard surfaces such as stone or concrete. Direct contact or rubbing against hard surfaces could cause damage to the crystals.