NIOBIUM DISCOVERY SOON TO BE ANNOUNCED?

Is it possible?

ENV posts #Niobium on Twitter and then retracts the post.

Is it possible that they know they have made a Niobium discovery, but they need confirmation before they can announce?

So, it's clear that magnetically charged particles are stuck to the magnet in the pen, but what is it? Is it just Fe?
ENV has hinted Niobium. Is there any reason not to believe it's Niobium?

Looks like they've scraped the pen down the wall (See 2nd image: yellow arrows), which has resulted in an abundant collection of these magnetically charged particles over a 20-30cm distance.

Can anyone here shed light on the likelihood of whether or not it is in fact Niobium particles in the photos??