Minerals have a broad range so much so that they have their own discipline of study called mineralogy. These essential elements often have complex processes that lead to their formation.

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Cobalt is associated with the color blue, but it's so needed for rechargeable batteries that the U.S. put it on the list of minerals it can't live without.

By Dave Roos

Tanzanite is so rare, it is sourced from just an 8-square-mile (20-square-kilometer) area in Tanzania. It was first discovered in the late 1960s and it burst onto the jewelry scene thanks to Tiffany & Co.

By Carrie Whitney, Ph.D. & Austin Henderson

The Mohs hardness scale is used by geologists and gemologists as a way to help identify minerals using a hardness test. How does it work?

By Carrie Whitney, Ph.D.


This beautiful pink quartz is found in numerous places throughout the world and is thought to be associated with unconditional love.

By Carrie Whitney, Ph.D.

Diamond engagement rings. Diamond anniversary bands. Diamond earrings and necklaces. And now, the right-hand diamond ring! The four Cs -- cut, clarity, carat and color. Find out what the fuss is all about.

By Kevin Bonsor

From the Hope diamond to the shiny bits in instant coffee, crystals have always held the power to fascinate us humans. Are they more than just a bunch of pretty facets?

By Nicholas Gerbis

The element lithium is one of just three created during the Big Bang and has been used for mental health care for decades. But now it's in higher demand than ever before.

By Allison Troutner


You can find hematite found all over Earth, as well as Mars. The bloodstone the main source of iron and is also used in jewelry and painting.

By Trevor English & Austin Henderson

Curious about healing crystals and their meanings? Here's the lowdown on 12 of the most popular stones for wellbeing.

By Dominique Michelle Astorino

What's the difference between moissanite and diamonds? And which of these brilliant stones wins out when it comes to the engagement ring competition?

By Mitch Ryan

It was the world's largest diamond when mined and today it's cut into nine gems that are all part of the British Crown Jewels. But since the death of Queen Elizabeth II, questions have emerged about its imperialist history.

By Dave Roos