What's the tea with Niobium jewelry?
Niobium  is very similar to  titanium.  They’re both  elemental metals, corrosion resistant, biocompatible,  and  hypoallergenic  . 
It’s a bit  heavier  than titanium and  more expensive  to produce.  Niobium is silver in colour, but can be anodized into a range of fun colours. Niobium is ideal for body jewelry as it is  soft and malleable  enough to make insertion easy, but  strong and durable  enough to  resist scratches  that can  harbour bacteria.