There is a minimum of $10 and a maximum of $500. Em's Crystals Gift Cards can be used to pay for a portion of a purchase, with cash, debit, or credit used to balance the expense. As a precaution to mitigate the risk of losses, our gift cards will automatically be registered within Em's Crystals customer database—a procedure that allows the remaining balance to be tracked and frozen if a card is lost. In this way, these gift cards are safer than cash.