Dear friends,
i found a massive and granulated magnetite ore in a river bed. its about 50 meter long and 20 mt wide. in a hole nearby river edge, i collected approx. 10 kg of black sand. İ screened all of the black sand and some free quartz particles minus 30 mesh. When i looked into samples with a 1x100 magnifier i saw that all black grain is encrusted and stained with micron gold and silver spot disseminated onto magnetite particles. There was also no liberated free gold and silver grain in my pan. İ decided to make a spot test with aqua regia and sncl2 in order to test of gold or not.
Could you please tell me that if iron content was so high, would spot testing give the same purple color.?
Lets assume that micron gold was densely in magnetite ore then how could we sperate gold from magnetite?
Any helps would be appreciated.
Please note that particle size of gold and silver is below 75 micron.
i found a massive and granulated magnetite ore in a river bed. its about 50 meter long and 20 mt wide. in a hole nearby river edge, i collected approx. 10 kg of black sand. İ screened all of the black sand and some free quartz particles minus 30 mesh. When i looked into samples with a 1x100 magnifier i saw that all black grain is encrusted and stained with micron gold and silver spot disseminated onto magnetite particles. There was also no liberated free gold and silver grain in my pan. İ decided to make a spot test with aqua regia and sncl2 in order to test of gold or not.
Could you please tell me that if iron content was so high, would spot testing give the same purple color.?
Lets assume that micron gold was densely in magnetite ore then how could we sperate gold from magnetite?
Any helps would be appreciated.
Please note that particle size of gold and silver is below 75 micron.