This agate coaster features a beautiful blue and white gradient. - Color: Blue and white gradient - Shape: Round - Material: Agate Thank you for viewing. I purchased this about 15 years ago, but I never used it as a coaster, instead displaying it as interior decoration or storing it away. I am selling it now to declutter. There is a hole in the center of the third photo, but it was like this when I bought it. It appears this is how the cross-section looked when the raw stone was cut for the coaster. The fourth photo shows how it looks when held up to the light, so it looked very beautiful in the sunlight when displayed during the day.