What do your tummy ache cure, your eyeshadow and your home sprinkler system have in common? All three involve an iridescent metal called bismuth. You …
Green or Blue? The Best Turquoise Is More Valuable Than Diamonds
Cultures all over the world have treasured turquoise for its color and rarity for thousands of years. But the beautiful color comes at a cost. Learn about the origins of other colors as we discover why turquoise is so valuable.