Contact 19 Mosaics, show your card (in person or send a picture), 19 Mosaics will then send you a coupon code to be used when making a purchase.
Once you have the code go to the checkout as normal. On the 'Enter your info' tab you will see a link 'ADD COUPON'
Click the ADD COUPON link. A box will then appear for you to enter your code.
Enter your code in the box and click the 'ADD' button. You will then see the 10% discount applied. Continue checking out.
If you have any problems please contact me before completing the order.