Tree Agate and Moss Agate, both varieties of chalcedony, are known for their distinctive inclusions resembling tree branches or moss; Tree Agate, with its white base and green dendritic inclusions, forms primarily in India and central Europe, while Moss Agate, displaying a translucent background with green, red, or black moss-like patterns, is commonly found in the USA, India, and central Europe.
These earrings just make me feel "natural!" I bought the second pair because I loaned my first pair to a gal getting married in Hawaii and thought she should keep them and, she too, loved the gift!