a mineral scratches a piece of gold ore

  • Mohs scale of mineral hardness Wikipedia

    The Mohs scale of mineral hardness is based on the ability of one natural sample of mineral to scratch another mineral visibly. The samples of matter used by Mohs are all different minerals. Minerals are chemically pure solids found in nature. Rocks are made up of one or more minerals. As the hardest known naturally occurring substance when the scale was designed diamonds are at the top of

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  • Natural Gold And Quartz Mineral Specimens For Sale.

    Gold And Quartz Specimens. This page is dedicated to the gold thats still attached to quartz or a host rock. This type of gold is highly desired in the mineral collecting community. Gold/Quartz specimens are in a completely different league of their own. Remember the specific gravity of quartz is 2.65 times heavier than water whereas pure

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  • Identity Help Breccia?? Gold ore?

    I did a photo search using google images and everything that pops up that supposedly matches my picture fall into the oxidized Gold Ore family. There is however golden specs that seem to appear more and more when I clean it with hot water and soap. I used a small pick and scratched one of the specks and scratched the parts of the vein that look oxidized and the

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  • Gold Geoscience Australia

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  • How to Identify Valuable Rocks Sciencing

    If you can scratch it with a penny its hardness is 3 Mohs and if it takes a piece of glass to scratch it the hardness is 5.5 Mohs. Any stone that scratches porcelain instead of leaving a streak has a hardness of about 6.5 Mohs. Diamond is the hardest mineral its hardness is 10 Mohs and you can scratch one only with another diamond.

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  • Extracting Gold from Rock PBS

    Gold like most minerals can be 'dissolved' in mercury to create what's called an amalgam. An amalgam is a physical mixture of metals or a type of alloy. Using mercury is a pretty

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  • What is Gold Ore worth? High Grade Mining Ore

    In other word ore is the most basic raw form of a mineral which requires additional processing for the valuable minerals (gold) to be removed. A single piece of gold ore generally has very little actual gold content. Although a very rich ore may have some visible gold present the vast majority do not actually have any visible gold present and only crushing and processing of the ore will

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  • Mohs Hardness Scale Rockroost

    A mineral's "streak " or color when it is finely powdered is always the same even when the color of the mineral varies. (The color of the streak can be very different from the color of the mineral itself.) Rub your specimen across a piece of porcelain tile (a "streak plate") and examine the color it leaves behind. Once you have performed your tests compare your results with a

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  • Photos of gold ores quartz telluride gold ore and gold

    Common gangue minerals in gold ores include quartz fluorite calcite and pyrite but many others can be found in smaller amounts. This piece of gold ore does not look very spectacular but millions of tons of this material have revolutionized gold mining across the world. It is a sediment hosted bulk gold deposit. This gold ore is typical of a great series of deposits extending north and

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  • 3 Ways to Identify Gold in Quartz wikiHow

    Real gold will not scratch a piece of glass but other minerals that look like gold often do. If your piece of quartz has a corner or edge that looks like gold on it try scratching this against a piece of glass. If it leaves a scratch it is not real gold. You can use any piece of broken glass or mirror for this test. Just be sure to use something that you don't mind scratching. 4. Scratch a

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