Black Obsidian Square Coasters Origin: India Quantity: set of 2 Size: 3"-5" avg Uniqueness Guaranteed: Every gemstone piece is one-of-a-kind so they can vary in size, shape, and color. While we select them at random, they'll be as beautiful as those in the photos. Custom Requests: Have specific preferences? Leave a message with your order, and we'll do our best to accommodate your requests if possible.