Unique Round Large Agate Style 1 of a Kind Coaster Set. Australian Handmade using Australian supplies this is a  Set of 4 large round agate style blue and silver resin coasters with silicon feet on base to stop from slipping or marking furniture. Great gift idea, birthday, xmas, wedding, house warming. CARE OF RESIN ITEMS  The resin used in coasters is heat resistant only UP TO 70 degrees Celsius  Wipe clean with a lightly dampened cloth only  Never wash or use harsh chemicals or abrasive cloths  Not dishwasher safe  It is advisable to store resin products out of direct sunlight as too much heat can cause the resin to discolour and/or soften and warp.