"Resource Investing News is the part of the Investing News Network that focuses on the world of Resource. Across the network, we bring you unbiased, independent news and information. Here, specifically for investors, miners and end users interested in Resource."
Although a platform for a lot of parties with interests (sell side analysts, sponsoring companies), the site also has some decent general content, and covers some interesting unknown juniors in metals/minerals which don't receive a lot of publishing besides this site. The site has been working on its content this year (2015), and recently started offering an array of useful investor kits for starting mining investors.
Resource Investing News has several other related sites categorized per commodity, Criticalinvestor.eu only lists Precious Metals/Energy/Base Metals Investing News as sites of interest to limit the already fair amount of feeds on the homepage.