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What is the sound of coins being handed from one person to another?
I would say 「じゃらじゃら」 is probably most common for that action, followed by 「カチャカチャ」.
(Far) less common would be 「チャリン」 for handing multiple coins. That would, however, be a very natural onomatopoeia choice if you are dropping just one coin onto a hard surface.
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