Here in Germany it would be even 19% if its a product like jewellery and not fine gold. A currency coin (like the eagle) has a reduced tax rate, it like 9% or so. For silver this applies even if its fine silver. Thats why almost no one ever buys silver bars here, unless they are "branded" currency, like the Fiji bars.
Fine gold however is tax free in any form. Even the profit you make from selling it again is tax free, if you have held it longer than 12 month.