This classic RabLabs design, named after the Portuguese word for "rock," makes an ideal host or hostess gift. In ancient times, agate was thought to possess incredible virtues, protecting its guardians from all dangers. Each coaster is lovingly hand-polished in Brazil, and protected by rubber feet on the underside. This is a natural product; no two coasters are alike. Set of 4. Approximately 4.5" in diameter.