This little Peter Rabbit thimble is made from genuine fossilized mammoth by Anouk Johanna, a native Dutch woman currently residing in Santa Cruz, CA. She creates many lovely scrimshaw items. Her thimbles are about 1 1/4 inches high and about 1 inch in diameter at the base. Her website features several more examples of her thimbles, including thimbles featuring Jemima Puddleduck; Pig Robinson; Pooh, Piglet and the Honey Jars; The Three Bears; The Tailor of Gloucester; Tommy Kitten; Pooh, Owl & Piglet; and Christopher Robin and Friends. The color thimbles are about $425.00 (it varies) plus S/H, with the monochrome (dark brown) thimbles priced at about $325.00.
You can also get a matching itty-bitty thimble stand for $15.00. The items on the site have already been sold, but Anouk can replicate any of the designs or create a custom design (more expensive). She also does custom watercolors.