Crystals and gemstones can be more than just beautiful—they can be deadly. Minerals like arsenopyrite, cinnabar, galena, and torbernite carry toxic substances like arsenic, mercury, lead ...

Many minerals form beautiful crystals, but the most prized of all are gemstones. Uncut gems often look fairly ordinary–like rocks. It's only when they are cut and polished that they obtain the ...

Let’s explore the deadliest crystals, minerals, and gemstones that, despite their dazzling appearances, pack a dangerous punch. 1. Arsenopyrite At first glance, arsenopyrite looks like a shiny ...