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Julius Caesar AR Denarius with gold toning
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<p>[QUOTE="Severus Alexander, post: 3084498, member: 84744"]I'm no expert, but since no expert answered your question, I'll give it a shot. My understanding is that both the gold colour and iridescence is normally ordinary silver sulfide, i.e. silver tarnish, just in a very thin layer. If left to tone naturally it will eventually turn grey, then black. The speed will depend heavily on the storage method & local conditions, i.e. degree of air circulation, level of humidity, temperature, levels of sulfur in the storage material & air etc.[/QUOTE]</p><p><br /></p>
[QUOTE="Severus Alexander, post: 3084498, member: 84744"]I'm no expert, but since no expert answered your question, I'll give it a shot. My understanding is that both the gold colour and iridescence is normally ordinary silver sulfide, i.e. silver tarnish, just in a very thin layer. If left to tone naturally it will eventually turn grey, then black. The speed will depend heavily on the storage method & local conditions, i.e. degree of air circulation, level of humidity, temperature, levels of sulfur in the storage material & air etc.[/QUOTE]
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