Home » Minerals
What Are Minerals?
Minerals are materials that meet five requirements. They are: 1) naturally occurring, 2) inorganic, 3) solids, 4) with a definite chemical composition, and, 5) an ordered internal structure.
Copper vs COVID-19
Copper Kills COVID-19 and many other pathogens to limit the spread of disease.
Calcite is a carbonate mineral with industrial, agricultural, medical and many other uses.
Topaz is a mineral best known as a durable gemstone and its use in Mohs Hardness Scale.
Fool*s Gold is a name used for pyrite when its brassy color fools people looking for gold.
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Fluorescent Minerals glow with spectacular colors under ultraviolet light.
Diamond: The Mineral
Diamond is a mineral with unique properties and many gem and industrial uses!
Diopside - Gem material, ornamental stone, diamond indicator, industrial mineral.
Quartz is the most abundant mineral in the crust. It has many useful properties.
Rock and Mineral Kits
Rock and Mineral Kits The most effective way to learn about rocks and minerals.
Benitoite - discovery of the State Gem of California - USGS report from 1911.
Charoite is a purple silicate mineral, found only in Russia, used as a gem material.
Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses.
Diamonds from Coal?
Diamonds Do Not Form From Coal That is one of the biggest misconceptions in science.
Magnesite is a carbonate mineral used for chemicals, fire bricks, magnesium metal and more.
Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone.
Don*t Go To Jail
Mineral collectors must know the rules for removing specimens from public and private property.
What Are Minerals?
Minerals are the building blocks of our society. We use items made with them every day.
Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire.
Ilmenite - The primary ore of titanium and source of most titanium dioxide.
Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot.
Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material.
Vanadinite is an important ore of vanadium and a minor source of lead.
Hematite - the most important source of iron ore and mineral pigment since prehistory.
Tourmaline - the most colorful mineral and natural gem material on Earth.
Tucson Mineral Show
Tucson Gem & Mineral Show Photos from the largest gem and mineral show.
Geology Dictionary - contains thousands of geological terms with their definitions.
Chalcopyrite - The most important ore of copper for over five thousand years.
Sugilite is a rare mineral and a gemstone best known for its vibrant pink to purple color.
Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Lepidolite is a pink to purple mica used as an ore of lithium and as a gem material.
United States Gemstones Small mines in the U.S. produce a diversity of gemstones.
Cinnabar - the only important ore of mercury. Used in pigments until its toxicity was realized.
Rare Earth Elements
Rare Earth Elements are used in cell phones, DVDs, batteries, magnets & many other products.
Rhodonite - a manganese silicate used as a minor ore of manganese and as a gemstone.
Hardness Picks - Test for hardness with precise and easy-to-use hardness picks.
Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler.
The Streak Test is a method to determine the color of a mineral in powdered form.
Variscite is a yellowish green to bluish green mineral. It is similar to turquoise and cut as a gem.
Rutile - an ore of titanium; a source of titanium oxide; causes stars and eyes in gems.
Spodumene is a pegmatite mineral, an ore of lithium and sometimes a gemstone.
Crystal Habit is the external shape displayed by a crystal or an aggregate of crystals.
Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler.
Zircon is the primary ore of zirconium and a gemstone that is available in many colors.
Rock-Forming Minerals - most of Earth*s crust is made-up of a small number of minerals.
The Acid Test
The Acid Test Geologists use dilute hydrochloric acid to identify carbonate minerals.
Herkimer Diamonds Doubly-terminated quartz crystals used as specimens and gems.
Serpentine - metamorphic rocks used in construction, architecture and lapidary work.
Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Gold Panning Kits
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for gold!
Is Water a Mineral?
Are Water and Ice Minerals? Comparing their properties with the definition of a mineral.
Kyanite is a metamorphic mineral used to make porcelain, abrasive products and gems.
Uses of Gold
Gold has unique properties that make it one of the most useful minerals.
Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool.
Molybdenite is the primary ore of molybdenum which is used in superalloys and as a lubricant.
Uses of Talc
Talc is a soft mineral used in cosmetics, paper, paint, ceramics and many other products.
Mineral Rights - Who owns the minerals under your land? Who wants to buy them?
Fireworks & Minerals
The Science of Fireworks Learn how the colors and shapes are created.
Denver Mineral Show
Denver Gem and Mineral Show - Photos and comments about this incredible show.
Gifts That Rock
Gifts That Rock - What are the most popular gift items in the Geology.com store?
Minerals in Colored Glass - Minerals are what produce the color in colored glass.
Abandoned Mine Accidents kill several people every year. Education can prevent deaths.
Olivine Rain Spitzer Telescope discovered a rain of olivine crystals on protostar HOPS-68.
Pyroxenes are a group of chain silicate minerals found in igneous and metamorphic rocks.
Limonite - an amorphous iron oxide. An ore of iron and a pigment since prehistory.
Uses of Silver
Uses of Silver Most people think of jewelry and coins, but silver\'s primary use is industrial.
How Do Snowflakes Form? They start as tiny crystals. Some grow on the way down.
Triboluminescence is flash produced when a mineral is rubbed, scratched or broken.