Featured this weekMineral
Millerite
NiS
Millerite is known for its interesting crystal habit of slender brassy crystal growths and hair-like tufts. It frequently forms inside geodes and vugs where it has the room to develop its interesting crystals.
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Molybdenite is the most prevalent molybdenum-bearing mineral, and is named after that element.
Mineral
Molybdenite
Turquoise is an antique ornamental stone, highly regarded for its unique and striking namesake color.
Mineral
Turquoise
Ametrine is a relatively new gem term, and the word is a combination of Amethyst and Citrine.
Gemstone
Ametrine
Riebeckite forms in two very different habits.
Mineral
Riebeckite
Cryolite is an unusual mineral with an interesting history.
Mineral
Cryolite
Rutilated Quartz is a transparent Quartz with golden yellow Rutile inclusions that are in hairlike growths.
Gemstone
Rutilated Quartz
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The Mineral and Gemstone Kingdom is a free informational and educational guide to rocks, minerals, gemstones, and jewelry. This site has been providing detailed information and photos of hundreds of minerals and gemstones since 1997 and is one of the leading education resources on minerals and gemstones. More →