Probably because CIE - despite its name - has absolutely NOTHING to do with cobalt. They explore for deep water oil and maybe natural gas? I've never once recommended this stock and to be honest, never even heard of it before.
To answer your question, there isn't a good pure play on cobalt, at least not yet. If you want to play Glencore, one of the world's leading producers of cobalt, you have to realize that cobalt represents only 5% of their EBITA. They are a huge global mining company and cobalt is a by-product metal of copper and nickel, which are much bigger drivers of revenue for the behemoth mining companies. On the other end of the barbell you have little penny stocks like eCobalt (which I started recommending when the stock was ~0.40ish cents) or Fortune Minerals, which are fully engaged in the exploration of cobalt properties. However, these juniors will never be large producers of cobalt because again, it's a by-product metal and deposits of cobalt in eCobalt's Idaho property - while fully permitted - will never amount to meaningful production. Maybe 1,000 MT per annum?
However, in a rising tide, all boats are lifted and the eCobalts of the world have been direct beneficiaries of cobalt's price ascension over the last year. You will see other mining and exploration companies (almost all of them Canadian based) scramble to change their name and prospectus to include cobalt exploration. It's what happened during the uranium run of 2004-2007. But eCobalt has advanced 388% over the last year, so is that something you want to jump into now? I wouldn't, and we know the act of these junior miners....as soon as they catch a bid, they are out there issuing more shares. Rinse and repeat.
IMO, I think we'll see a cobalt pure play come to market, much like UPC did with uranium, only I think the operators and underwriters will be smarter with this product, ie - not simply a closed-end fund.