The best method for cleaning Picasso Marble is to simply use warm soapy water with a soft cloth. Be sure to dry the stone and all jewelry settings thoroughly before storing or wearing. Remove  jewelry before playing sports or any other activity leading to perspiration. 

If you are unhappy with your purchase when you receive it, you may return it within 2 weeks, provided necklace has not been worn.  Return shipping will be at Buyer's expense.  I will provide a full refund, minus shipping charges.  Please email me if you would like to return it.  

I ship anywhere in the United States.  International shipping is unavailable at this time.  I use USPS Priority Mail using a Flat Rate Small Box for all shipments.  I can easily fit multiple gift boxes with the necklaces in one.  The Flat Rate Small Box price is $7.20 to anywhere in the U.S.  It typically gets to its destination between 1-3 days.