Contact  Home  Links  Research Center  Stories  Expeditions  Placer Locations  Safety  Online Forum  Gold Gallery  Video_Archive  Gold and Pyrites  Rocks-Minerals-Gold  Precious Metals Prices  Getting Started  Legal Issues - Mining Law  GPS Units  Gold_Rush!  Extractive Metallurgy  Arizona Ghost Towns  Search Engine  Cool Tools  Hard Rock/Open Pit Mines  De Re Metallica  ATVs  From the Past  Recent Finds News  Forex and Gold  Extras  Equipment Dealer Review!  Old Books from the 1800's Online  1872 Mining Law  Privacy Policy  Gold Miner Game  Guide to Buying a Claim  Equipment for the Desert  Most Popular Gold Detectors  Ebay Auctions!  USGS Data  Arizona Mine and Mineral Museum  GIS  Topo Maps  Ore  Google Maps/Google Earth  NASA World Wind  Gold Macros  Aqua Regina  Newsletter  Buy me a Cold One  Custom Research  Equipment for Sale  Metal Detector Manuals  My Books  Straight Talk  Minerals List Type Database  Tucson Gem and Mineral Show  Place Names Database  Gems and Minerals  Gold Price  Mining Dictionary

 

Gold and Pyrites - new higher quality pictures on Page 2

Buy Gold Ore

Every month I receive a dozen or so emails with people asking me "I found something I'm not sure if it is gold or pyrite, how can I tell?"

It can be tricky to the beginner! Below I have added some pictures that show the differences in common pyrites found in Arizona and Arizona gold. I detected all the gold you see in the pictures below with using either a White's GMT or a Minelab GP Extreme. Click the pictures to enlarge them. All the gold below is specimen gold they are not nuggets. The reason I used specimen gold is all of the pictures I am sent always have "host rock" in them. You cannot "flake" gold off a rock with a knife, if you hit gold in rock the rock will break/shatter but the gold will flatten/bend. Pyrite if struck with a hammer will shatter/crumble.

p3.jpg (331558 bytes)   p4.jpg (527773 bytes)   p2.jpg (534878 bytes)

p1.jpg (512838 bytes)   p5.jpg (515996 bytes)

It is the most malleable and ductile metal known; a single gram can be beaten into a sheet of one square meter, or an ounce into 300 square feet. A soft metal, gold will readily form alloys with many other metals. This can be done to increase its strength, or create several exotic colors, sold for instance in the western United States to the tourist trade as "Black Hills" gold. Adding copper yields a redder metal, iron green, aluminum purple, platinum metals white, and natural bismuth together with silver alloys produce black. Native gold contains usually eight to ten per cent silver, but often much more alloys with a silver content over 20% are called electrum. As the amount of silver increases, the color becomes whiter and the specific gravity lower.