1. Material: Natural Stone / Natural Slate / Marble 2. Size: 5*7cm,6*9cm and any sizes 3. Unique laser engraved surface Natural Stone Coaster1. Eco-friendly : According with food safe certificate and international standard2. Handcrafted from top quality slate or ceramic or glass3. Shapes of slate : round, square, rectangle4. A variety of sizes, shapes, packings for your choice5. Each set is ...