The rock in the photography has a cloudy outer layer of approximately 3 - 5 mm of thickness; where that layer has been removed appears with an intense brightness metallic silver colour ( see closeup), its hardness is greater than the quartz. What rock could be?
More hardness than quartz -- help id
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pegleglooker
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Eu_citzen
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I don't think you could fail so badly with a hardness test.... :Pallen_idaho said:
I think it's quartz. If you scratch quartz against quartz it should not happen anything as they are the same hardness.
Else I would also consider it really.
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Hemisteve
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It could be Adventurine, a quartz with other minerals mixed in.
You mentioned a metallic luster but the photo does'nt show to well.
Do a Google search for quartz.
Steve
You mentioned a metallic luster but the photo does'nt show to well.
Do a Google search for quartz.
Steve
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Eu_citzen
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Kinda blurry pic. Hard to ID from such pics ya know.
Luster is how it looks like i.e metallic luster looks like a metal.
About the intense light it's called reflection kinda like a mirror.
:P
That is often when using the lightning thingy on the camera.
Luster is how it looks like i.e metallic luster looks like a metal.
About the intense light it's called reflection kinda like a mirror.
:PThat is often when using the lightning thingy on the camera.
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From the picture it looks like hydothermal Quartz (SiO2) Silicon Dioxide The outside layer looks like weathering but could be a calcite layer. if you drop swimming pool acid on it it will bubble if it is a calcite. the other possibility is araganite. All are formed in a hydrothermal environment. You know yesterday I was such a pert. Now I have retired, so I am now an ex- pert.
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TRhubnter: I have tested it with acids: hydrochloric, sulfuric and nitric, also with (spanish) "soda caústica" (bleach, lye): no reaction... I have not tested with hydrofluoric acid (it is too dangerous to handle).. respect to the hardness I can assure that this rock, the nucleus as the outer layer, has greater hardness than the quartz...
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allen_idaho
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You have to be careful with caustic soda. That stuff will mess up your lungs real quick.
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Harder then Quartz would make my next guess by the look and color and if it steaked white would be curundum. Aluminum oxide, 9 on the mohs scale. this is the same as the gems ruby and sapphire. It does not have the look of a beryl which is 8. good luck finding out.
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TRHunter:
Thanks, you have given me a good clue.
The stones that appear in the thread subject http://forum.treasurenet.com/index.php/topic,121989.0.html could be corundum too?
I say it because the pebbles in the images in these thread they comes from the same region that the stone about i spoke in this subject and when looking for corundum images I have found http://gwydir.demon.co.uk/jo/minerals/corundum.htm where they appear two stones that remember to me the pebbles blue color which I mentioned in that subject (the composite image serves to compare).
How I could prove or discard that they are corundum
.
It's normal or natural to find corundum (safiro, ruby) coated?
The gray or silver color stone in this subject can be very valuable (by its size and because it seems to be gem quality )
I will graduate as treasure hunter if I found a corundum mine? (in fact it disappoints a little to me, I thought that I had found diamonds)
Where and how to obtain financing ??
Thanks, you have given me a good clue.
The stones that appear in the thread subject http://forum.treasurenet.com/index.php/topic,121989.0.html could be corundum too?
I say it because the pebbles in the images in these thread they comes from the same region that the stone about i spoke in this subject and when looking for corundum images I have found http://gwydir.demon.co.uk/jo/minerals/corundum.htm where they appear two stones that remember to me the pebbles blue color which I mentioned in that subject (the composite image serves to compare).
How I could prove or discard that they are corundum
.It's normal or natural to find corundum (safiro, ruby) coated?
The gray or silver color stone in this subject can be very valuable (by its size and because it seems to be gem quality )
I will graduate as treasure hunter if I found a corundum mine? (in fact it disappoints a little to me, I thought that I had found diamonds)
Where and how to obtain financing ??
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Eu_citzen
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http://www.webmineral.com/data/Corundum.shtml
Above link has most info ya need for ID of corundum.
Hope it helps,
Eu
Above link has most info ya need for ID of corundum.
Hope it helps,
Eu
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Hello:
Somebody can inform to me:
What must happen when one warms up a corundum with a microwaves oven?
It is possible that a corundum ( a pebble like which I have shown in this thread, but smallest ) remains to room temperature after one minute of heating?
If this cannot happen with a corundum then what stone class could be?
Somebody can inform to me:
What must happen when one warms up a corundum with a microwaves oven?
It is possible that a corundum ( a pebble like which I have shown in this thread, but smallest ) remains to room temperature after one minute of heating?
If this cannot happen with a corundum then what stone class could be?
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Eu_citzen
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huh? lol trying your own ways to ID a mineral? 
I'll send you a PM soon and explain what info I need to ID a mineral quite well..
Lets do this right...
Regards,
Eu
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