Rock Paradise Black Agate Slices - Set of 4 - A Grade ~3-5" - Brazilian Agate and Crystals - Art Crafts - Geode Agate Slice Exclusive COA Black Agate Slices - Set of 4 - Brazilian Agate And Crystals - Art Crafts - Geode Agate Slice with Rock Paradise Exclusive COA This listing is for FOUR (4) Agate Slices. STOCK PHOTO. Agate slices will vary in shape and overall characteristics. Each one has its unique shape and colors for they are slices of natural geodes. Those agate slices have approximately between 3-5 x 2.7-3.9". Please refer to picture for further reference. Agate Slice Comes with Rock Paradise Exclusive Certificate of Authenticity (COA)