Niobium Digitalisation silver & niobium coin (2025 Austrian Mint)
Launched way back in 2003, to much acclaim, the Austrian Mint's innovative Niobium series was quite unlike anything else out there at the time. A silver ring, inset into which is a disc made of a metal called niobium. This is quite unusual in that it can be coloured using anodised oxidation, rather than requiring the application [...]







