Kooalo Agate Coasters (4-5 inches) - Premium Set of 4 Large Blue and Purple Geode Crystal Drink Coasters from Round Brazilian Agate Slices : Amazon.co.uk: Home & Kitchen
Resin Coaster Set Black and White Geode Agate Resin Coasters - Etsy UK
BedRock Blue Agate Coasters for Drinks - Set of 4 - Brazilian Geode Decor - (4"-4.5" Blue) : Amazon.co.uk: Home & Kitchen
Blue Agate Coasters for Drinks - Set of 4 - Modern Gold Edge Stone Geode | eBay
Agate Coasters, Black Authentic Geode Stone, Set of 4 - Gifter World