Are those blue bowls legit?

[Barry-Goodknight]

blue bowl gold concentrator | eBay

I want to run a bunch of crushed rock through something. I saw these on youtube and wanted to know if they are good for pulling gold out of my crushed rock / sand material?

I would buy one of the big green wheel things but I don't want to spend that much before I make sure my rocks have enough gold in them to make it worth while.

I've been going to old gold mine tailing dumps and pulling stuff like this out:

 

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[Goodyguy]

You will need to crush that ore into fine powder for the blue bowl to separate the gold from the gangue.

The blue bowls work great provided you pre screen the material being run to at least 30 mesh to start and then keep classifying down to as small as 200 mesh. The blue bowl concentrator also works better on fine and flour gold than coarse gold

Your ore looks awesome!

 

[Hefty1]

Nuttn better...
Blue Bowl Concentrators

 

[Barry-Goodknight]

You will need to crush that ore into fine powder for the blue bowl to separate the gold from the gangue.

The blue bowls work great provided you pre screen the material being run to at least 30 mesh to start and then keep classifying down to as small as 200 mesh. The blue bowl concentrator also works better on fine and flour gold than coarse gold

Your ore looks awesome!

Yea, friend is visiting from out of town and we have spent the last few days driving around in the mountains screwing around at old mines. He went about 100 feet into an old mine yesterday, said it was amazing inside. I didn't go because I'm a big puss :T

That rock above came from an old mine we found today. Massive pyrite rocks everywhere and spread amongst them are green and black rocks with what appears to be gold all up in them.

 

[Barry-Goodknight]

Also, that rock above that shows gold, that gold runs across the entire face of the rock. You can't see it because there is a thin layer of that black rock on it. But if you look at it from the side, you can see the color run down the entire face. Hope it's all gold...sure looks like it is.

 

[DesertNuggets]

Looks like pyrite. Fools gold.

Only one way to know for sure. Crush it and pan it. Good luck!

 

[Alaskan Adventurer]

It does look like pyrite. Though I agree with Desert, crush and pan!

 

[Goldwasher]

as legit as you can get!

 

[Hoser John]

I was the 3rd dealer for the company and was proud to sell Mr.Hepfners, RIP as we are indeed greatly diminished, quality product for many years. If you look on the bottom of the ol'school bowls there is a numbered hot hand pressed stamp and it's age is thusly known. We had in the store a watertight wet processing area with a dozen or so bowls,micro-sluices,yellow jacket trommel,centrafuges,mini concentrators ,wheels and anyone could come in and process cons for FREE. Many dozens a goldfarbs were hauled in to try and we constantly compared every pan and whidget known to man at the time. When I retired from making retail equipment and moved to Auburn the only concentrator I took with me was ol' #126 and for over 34 years I hasn't missed a spec. Run right--throw away current instructions as NOT correct-- as it was designed and your good to go. John

 

[Gold Cube]

John,
could you tell us the right way to use the Bowl?
I classify 20, 30, 50, 70, 100, 200 then I remove the magnetics and run each batch separately. I only turn the water up just high enough to get things moving. Feeding the material, I use a turkey baster. I suck up material from a pan and squirt it into the bowl below water level. That way there is no way to float out the small flat gold. Feel free to add or take away, I am here to learn.

Mike

 

[Hoser John]

1st-classify all cons dry to 50-mesh to past 100 mesh. Extend the control valve hose at least 10" from the bowl as it causes a restricted C flow instead of a round 0 flow and causes aireation also from constriction. Your original D.A.M industries aka blue bowl must be absolutely level,use a level to check,water level will not be level as inlet force raises some. Dampen cons just wet to just cover and use only a fresh water inlet as rerunning dirty water increases the specific gravity of the water and when dealing with gold microns smaller than baby powder dust it all matters. Look at water on top for any oil,discoloration as must be clean. Run the bowl up till you see that righteous toilet bowl swirl-please note in Oz a different direction-you will be within a 1/4" or so from the top. Introduce with a big serving spoon at least 6" from the inlet to obtain the light feathering effect for proper floatation classification. Up against the wall and don't disturb the flow. Run for a minute or so till most blacks gone,then add more SLOWLY till the exit cone, after 3 minutes or so,still has a black circle around it. The largest black sands and gold will be left-dump and repeat. When all done simply let them dry and by a slight tap tap at about 15 degree angle the remaining black goes away,slight air pressure works also and righteous micro is yours. Caution as soooo small when scraping into a pile it creates a electrostatic charge and gold will jump around like spit on a griddle-party on and it's goooooood. Sometimes with good gold in low mineralized cons them micro square cubes do not remain and good to go as NUTTN' ever gets it 100% clean every time without outrageos loss-John