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Rocks and Minerals


racetrack playa
Sliding Rocks - Racetrack Playa How these rocks slide across a dry lake bed is a mystery. Photo © iStockphoto / Stephan Hoerold yosemite rockfall
Spectacular Yosemite Rockfall: A photo sequence of rockfall and debris avalanche by Herb Dunn. herkimer diamonds
Herkimer Diamonds: Learn how to find these doubly terminated quartz crystals at Herkimer, NY. mineral rights
Mineral Rights / Surface Rights
Who owns the minerals under your land? Have they been sold? blood diamonds
What are "Blood Diamonds"?
Have you seen the movie? Learn what "blood diamond" means. us gemstones
United States Gemstones: Opal, diamond, tourmaline, beryl, ruby, sapphire, peridot, beryl, agate. rock tumblers
Free Guide to Rock Tumbling:
Step-by-step guide to tumble polishing rocks into gemstones. gold uses The Many Uses of Gold: Learn how the unique properties of gold make it extremely useful.
If it is not grown, it is mined.
 
diorite
Igneous Rocks: Photos and facts about intrusive and extrusive igneous rocks.
gneiss
Metamorphic Rocks: Photos and facts about foliated and non-foliated metamorphic rocks.
conglomerate
Sedimentary Rocks: Photos and facts about clastic, chemical and organic sedimentary rocks.
mineral identification
Mineral Identification Chart Printable mineral ID chart by Art Crossman in MS Excel format.
Mineral Articles
Calcite
Corundum
Diamond
Kyanite
Magnetite
Quartz
Topaz
calcite Calcite: Calcite is one of the most useful minerals.
corundum
Corundum: Almost as hard as diamond, corundum is used as an abrasive. It is also the mineral of rubies and sapphires.
kyanite
Kyanite: Used to make spark plugs, high temperature bricks and stunning blue gemstones. higley copper
Higley Coppers: A story behind the first coins minted in North America. By John Carter.
Oil is found first in the mind.

pink topaz
Topaz: A popular gem. Most topaz has been color-enhanced by heating or irradiation. coal through a microscope
Coal Through a Microscope: Coal is more than a black rock. It's THE most interesting rock.
granite Uses of Granite: The rock used everywhere from the kitchen to the facing stone of skyscrapers. ammonite
Tucson Gem & Mineral Show: Some photos of interesting things that we saw at the show. stained glass
Colored Glass: A number of elements are used to produce the beautiful colors in stained and colored glass.
The present is the key to the past.
 
ametrine
Ametrine: The bi-color gem that is a blend of golden citrine and purple amethyst. petroglyphs Petroglyphs and Pictographs A world-wide collection of rock art. © iStockphoto / Kevin Lange. indium wire Indium: The metal used in liquid crystal displays (LCDs), coatings on specialty glass and even as an aircraft window defogger.
cabochons Gemstone Cabochons: Many minerals are cut into rounded stones called "cabochons". Denver Gem and Mineral Show Denver Gem and Mineral Show A photo report from Geoffrey Notkin of Aerolite Meteorites. getting gold
Getting Gold: A practical treatise for prospectors, miners and students. Written by J.C.F. Johnson in 1898. barnett shale map Barnett Shale! Unconventional natural gas boom in Texas.
Geology underlies it all.
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