The mineral, called petrovite, looks almost otherworldly thanks to its bright, eye-catching color. Volcanoes are cool. Well, I mean, as long as you’re viewing them from a distance and they’re ...

Two men have been arrested of suspicion of stealing an estimated 60kg (132lb) of a rare semi-precious mineral in the Peak District. Police said a large quantity of Blue John was recovered from an ...

Yes, sapphires and rubies are basically the same minerals, although they look so very different. The blue color most commonly ...