HIGH QUALITY: The black stone coasters are made from 100% pure natural stone, with each piece handcrafted and quality inspected; we strive for perfection in every detail and exquisite craftsmanship; these slate coasters are extremely sturdy and durable, offering a long lifespan and embodying high quality EXCELLENT FOR LASER ENGRAVING: Size: 4 x 4 inch, thickness: 3.5-5.8 mm; the laser engraving effect is excellent due to the product's sufficient thickness and very smooth, flat surface, sturdy slate material; can precisely laser engrave its surface, producing clear patterns, photo and text; The blank slate coasters are perfect for etching, crafts, painting, drawing and artwork; adding a touch of personalization and artistic feeling to your home; it also meets the needs for etching, painting, drawing and other DIY projects PREMIUM PACKAGING: Each pair of black stone coasters is protected in a bubble bag; packaging box offers multi-layered protection; comprehensive safeguarding to protect product safety PROTECT TABLE SAFE: Bottom of each slate coaster equipped with four pads; protect your table from scratches and heat; prevent condensation from dripping onto the table; avoid water marks on furniture HOME AESTHETICS: Black slate coasters feature an elegant and luxurious appearance; natural colors and unique textures give each coaster a distinctive look; perfectly complement coffee table, dining table, living room, kitchen, bedroom, and various home decor; elevate interior design taste; add a touch of luxury to your home, the natural texture conveys a high-end, impression on your guests; They make wonderful presents for your love, family, and friends, suitable for housewarming gifts, Valentine’s Day, Thanksgiving, Christmas, Mother’s Day, Father’s Day, and more