Exciting Globular Conglomerates from the Ocean Floor. Donut Shaped Natural Sea Formations. Where is Jacque Cousteau when I Need Him, or His Son? I Have Little Clue as to What These are, but I Think They are Pretty Wonderous. Note the Mauve and Sulphurous Coloration Mixed in with the Off White. Rare Birds, and I Have Only What is Pictured ( 3 plus ) and Available as a Set.