'The Alchemist Jeweler': This Philadelphian made his made his own prosthetic thumb out of silver
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Michael Manthey, 69, of Grays Ferry, has made some unusual objects during his time as a jeweler. That includes his own prosthetic thumb, complete with a manicured nail after he sawed the tip of his natural-born thumb off during a construction accident at a yoga studio 15 years ago.