Laser Engraved by a small business in America. PROTECTION: Protect your table from stains with this unique coaster set. The glass holders protect your wooden furniture from sweating glasses, dripping coffee, soda, tea, Prosecco, long drinks and more! UNIQUE DESIGN: The tiles are made of natural dark slate stone, similar to granite, with hammered edges. The rubber felt feet under each coaster protect against scratches. They are a unique addition to all tableware sets! PRACTICAL: Just like chalkboard, the slate coasters (4 x 4 inches) can also be personalized using chalk so you never mix up your drinks at a party. MULTI-USE: Use the stoneware in a kitchen or bar or even use them as garden tiles for some outdoor decor. PERFECT GIFT: The cocktail coaster set is a great gift for weddings, a first apartment, birthdays or that friend that loves to host dinner parties! The dark gray is a classic, neutral color that is sure to please.