Photograph by blickwinkel/Alamy Rocks themselves are made of clusters ... Rubies, valued as precious gems, are the mineral corundum in its red form. Perhaps the country best known for its rubies ...

Most people know some very basic information about minerals, crystals, and gemstones, but likely wouldn’t be sure about what the real scientific differences are between the three categories.

became enamored of the area’s rich mineral mining history and began collecting all manner of rocks, from precious gems to fallen meteorites. The 14,000-square-foot museum will display more than ...

Some gemstones are also minerals, such as that classic rock diamond, but there are some gemstones that aren’t classed as minerals. A fancy example is pearl, a popular choice in the jewelry industry.