Thought this was very interesting, ........from the article
"The University of Johannesburg has successfully registered patents for a new device which is capable of identifying rocks that contain diamonds."
Amazing....these new detectors can differentiate between graphite, diamonds and other minerals!
Check out the full article here
Gamma rays used to find diamonds
Full Version: Diamond Detectors
Colorado Prospector - Gem and mineral prospecting and mining forums > Prospecting, Mineral Collecting and Treasure Hunting Forums > Treasure Hunting and Metal Detecting
there already is a device thatll do this Dan. it works off of specific frequanceies. everything has its own specific frequancie.and its measured in the audio range of freqancies.these devices go by many names depending on who your talking to.
Yep. They've been around a long time.
Not successfully registered patents though guys! 
QUOTE
"The University of Johannesburg has successfully registered patents for a new device which is capable of identifying rocks that contain diamonds."
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