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Back to Rocks and Minerals Articles Kathy Feick Platinum is among the rarest and most expensive of the popular precious metals. Natural platinum is fairly impure. It is always associated with small amounts of other elements (gold, copper, nickel and iron) and commonly contains the rare metals platinum, palladium, rhodium, iridium, osmium and ruthenium.

About the Rock Identification Key. This Rock Key has been designed and written to assist children and adults in identifying the common rocks they find in their back yards and on memorable vacations. Anyone may copy it freely for noncommercial use.

Rocks under the Microscope. Pictured below are some common rock types as seen under the microscope. The images are classified according to rock type (sedimentary, igneous, metamorphic). Each thumbnail has a short caption and links (by clicking on the thumbnail itself) to .

Identifying Gold Bearing Rocks. Gold is a very rare and precious metal that is soft, malleable and heavy, and it is often found with other minerals, such as quartz. Learn about the differences between gold and fool's gold with help from a lab manager and research scientist in this video on identifying rocks.

PURE GOLD AND IRON FROM SAND. By C. Montgomery M'Govern. By the courtesy of Prof. Elmer Gates, one of the foremost American investigators of today, we publish below the first account of his newly discovered method for the extraction of iron and gold from sand. This justly may be ranked as one of the most important inventions of this century.

Rocks are so common that most of us take them for granted—cursing when we hit them with the garden hoe or taking advantage of them to drive in tent pegs on summer camping trips.

Look for round or rounded rocks well above the present high water level. Round or rounded rocks have lived in a river at some time in their lives. Always keep in mind that these are the most likely places to find gold. There is an old saying: "Gold is where you find it."

Such aluminumrich rocks need to have been subjected to amphibolite grade metamorphism (high pressure and temperature). Thus you should be looking mountainous terrains or continental cores known as cratons that have extensive regions of metamorphic rocks, some containing amphibole and mica.

The following is a list of rock types recognized by geologists. There is no agreed number of specific types of rocks. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe rock types. Additionally, different classification systems exist for each major type of rock.

The meaning of its name is unknown, although its origins are AngloSaxon. Gold is a soft, shiny, yellow metal, and has been used and highly valued by humans for 4,500 years. It is the most malleable and ductile of any element and it can be beaten into a metallic film a few microns thick. Gold is also a good conductor of heat and electricity.

Over one million copies have been sold. It has about 100 pages of basic gemstone information and about 200 pages dedicated to photos and descriptions of over 100 gems and gem materials. It contains about 1900 photos of gemstones in rough and cut states. It is an easytounderstand book written for people high school age and up.

Rocks and Minerals By Jan C. Rasmussen (Revised from a booklet by Susan Celestian) 2012 Donations for reproduction from: Freeport McMoRan Copper Gold Foundation Friends of the Arizona Mining Mineral Museum Wickenburg Gem Mineral Society epidote fluorite calcite gypsum quartz pyrite .

I found this beautiful quartz during a recent rock hounding trip in Lineville, Alabama See photos for visual quality! This one is amazing and there just may be Gold within the layers. AMETHYST GEODE HOME DECOR CRYSTAL QUARTZ PIRATE GOLD TREASURE MINERAL ROCK

A strongly foliated crystalline rock, formed by dynamic metamorphism, that can be readily split into thin flakes or slabs due to the well developed parallelism of more than 50% of the minerals present, particularly those of the lamellar or elongate prismatic habit, mica and hornblende.

Also, if you have a small hand microscope (available at most mining supply or lapidary shops), take a closer look at the small rocks and iron sands in your gold pan. You may be surprised at how much gold is clinging to the sands or small pieces of stone! In a lot of cases, the deepest portion of a bedrock crack or crevice will contain the most ...

Over one million copies have been sold. It has about 100 pages of basic gemstone information and about 200 pages dedicated to photos and descriptions of over 100 gems and gem materials. It contains about 1900 photos of gemstones in rough and cut states. It is an easytounderstand book written for people high school age and up.