Please can someone Explane "SG" to me in Linemans terms.. My understanding is 1 cup of water = W , and one cup of Ore = O ... W + O = Total , T (I dont see a Devide Buttin) .... T ~ W = SG of O.??? :) ??? HaHa ???
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Hey Thats Great CrazyCrusher I Found a Place in Az. that Will Assay Ore at a Fair Price http://www.assayfast.com/ . Untell I get My Propain Smelter this Year will Have to send it out. But I Would Like to Know How to Identiffy differnt Rock I Just got an Acid Test Kit, "Indy" Gave me there weblink. perty nice came with a Stone and 6 Acids for $9 pluss shiping. Ted Gave me Info on Finding out How Much Gold is in ore using a smelter Oz pet ton But I would like to Identiffy Rhodium and Uranium and others so I Know What rock I putting in my POCKET. Haha Thats why I'm Thinking the BloePipe
Thank You CrazyCrusher you put it Plain English, How much of that SG-7 should I reserve for other Minerals like Iron or Quartz ? Do you Know how to test with a Blow-Pipe ?
Hey Spur, I don't think there is any way to tell percentages in a sample without crushing it and running tests, such as chemical testing, bead testing, blowpipe testing, etc. Also test tube and open test tubes.
With a blowpipe, you look for the color of the sublimate on the charcoal which can then narrow it down to perhaps a dozen different minerals. I do have a flow chart for testing and stuff, however the chemical methods involve getting a hold of a dozen different chemicals to do complete testings. With just Nitric and Hydrochloric acid you can narrow down metal oxides to 3, either Mercury Oxide, Silver Oxide or Lead Oxide, then it's only a matter of checking further to find which oxide it is.
Send me a private message with an email, and I'll forward you some info for you.
I think I am Supost to Measure the Volume of water with, and without the Rock, Then Do some More Math ?
The volume of water is irrelevant, pint, quart, gallon, etc. doesn't matter. Nor does the unit of weight, ounce, gram, pound, as long as you use the same scale for the air weight and water weight.
let's say your scale is in grams. You sample weighs 100 grams hanging in air. Let's say when you put it in the water, it weighs 85 grams. Take the air weight of 100 grams and subtract the water weight of 85 grams and you get a difference of 15 grams in weight. Now... take your air weight of 100 grams and DIVIDE it by your 15 grams, (the difference between air and water weights), and you get 100 divided by 15 is : 6.67. Your SG is 6.67.
Keep in mind, ore can contain higher or lower amounts of quartz, lead, copper, and a lot of nitrates and oxides that will toss off the weights. In my opinion, anything with an SG of 7 or more deserves a closer look, and maybe a chemical assay! Think if you had a rock that had a SG of say 4.0, yeah, it may be just junk, BUT, a 1 pound rock may hold a gram of ultra fine gold. Anything that weighs more than 4 times the weight of water for its size is worth looking at it more in depth!
OK, I'm not sure if I am doing This Right, Here are Three Differn't Ores, and Pic's of the Process..
# 1 Weights in at 1.75 oz. an in the Air, and the Water at 1.15 oz.,........ #2 Air = 2.35 Water = 1.38 oz. .................. #3 Air = 1.65 W = .98 oz...
Most people get hung up on the units, such as ounces, pounds, grams. You don't need to think about the "weight units", as Specific gravity is measured in any and all units.
From your calculations,
#1 is 1.75 minus 1.15 = 0.6 : 1.75 divided by 0.6 is 2.92 , so sample #1 is 2.92 SG (rounded to 2nd place)
#2 is 2.35 minus 1.38 = 0.97 : 2.35 divided by 0.97 is 2.42, so sample #2 is 2.42 SG
#3 is 1.65 minus .98 = 0.67 : 1.65 divided by 0.67 is 2.46, so sample #3 is 2.46 SG
You can also scrap the decimal points, it will all come out the same anyways and easier to figure
As a rule of thumb, if a sample in water is more than 10 percent of the sample in air, it's going to be
less than 10 SG. A gold nugget will be about 4 to 6 percent difference in the water and in the air. A
100 gram air sample of gold should be about 95 grams in the water.
For practice, use a lead fishing sinker! You'll get the hang of it in no time!
# 1 Weights in at 1.75 oz. an in the Air, and the Water at 1.15 oz.,........ #2 Air = 2.35 Water = 1.38 oz. .................. #3 Air = 1.65 W = .98 oz...
You may be right in that choice. The crystal habit, color and SG all support that choice.
http://en.wikipedia.org/wiki/Zircon
Dickb
I'm going to offer a guess. Limonite
http://en.wikipedia.org/wiki/Limonite
Without actually seeing it and doing tests all you can do is guess.
Check it with a magnet and if it shows any pull, it probably is iron ore.
Dickb
Here is a Close up and a few more http://www.goldprospectorsspace.com/photo/033-1/next?context=user I Came up with an SG of 4.. I'm thinking its Zircon
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