Diamond cannot be traded, directly, to other players, so I don't see them allowing them to be put in the bank vault, which would be the same as trading.
I don't understand what you mean with your second comment. I can take 1, 2, or however many items out that I need. If you mean stacked items, you just have to shift-drag to split the stack and select however many you want from the slider window that comes up.
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I don't understand what you mean with your second comment. I can take 1, 2, or however many items out that I need. If you mean stacked items, you just have to shift-drag to split the stack and select however many you want from the slider window that comes up.