This mesmerizing green mineral is a uranium ore ... Orpiment’s golden-yellow crystals are visually stunning but dangerously toxic. Like realgar, orpiment contains arsenic.

Ram Mohan looks at how bismuth — a remarkably harmless element among the toxic heavy metals in the ... in the form of crystals with an oxide layer of varying width that reflects iridescent ...

In an Instagram clip that has racked up over 1.2 million views, he warns that green smoothies might not ... they form razor-sharp microscopic calcium crystals,” he explained.