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Michigan slang for: 1. Any individual who photographed deceased persons while they were still alive, and develops the film or images some time after their death. 2. A person who develops a deceased person's film some time after their death. 3. Anyone involved in post-mortem photography Refers to the days of black and white silver-gelatin processing, melded with stone refers to being lifeless, like a deceased person, hence silverstone. A silverstone's pictures can be color or black and white.
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