Got A Rock you Want Identified? Post it here! gimme a good picture or 3 or 4!

Can this rock be useful like granite or not ! Does genesis have any use bro

Eu_citzen said:
#1 Gneiss
#2 Granitoid
#3 Need close up
#4 Gneiss
#5 Granitoid (Syenite?) with pegmatite (Peggie is more coarse grained)
#6 Same as 2.
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What are the uses of gneiss & granitoid bro !
 

Guru3484 said:
I found this rock in my farm at the top layer . Will this rock go deeper inside ? Will this rock be worth like granite to make a quarry ! Pls help me bro
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I can't tell you that, "bro". The economics you can research on your own, now that you know what it is.
To tell if the rock continues with depth typically involves diamond drilling.
 

Okie bro .. thank u

Eu_citzen said:
I can't tell you that, "bro". The economics you can research on your own, now that you know what it is.
To tell if the rock continues with depth typically involves diamond drilling.
Click to expand...

Just to know , correct me if I'm wrong . Granite & granite genesis worth the same .
 

Hello! I'm actually a semi-visitor to this site, I recently bought a couple of rocks at a pet store with the intention of putting them in my fish tank, but first I wanted to confirm what they are! They were sold to me as "rainbow slate" which they do not seem to be...so if anybody could identify these rocks, I would be so grateful!

thumb_IMG_2493_1024.jpgthumb_IMG_2496_1024.jpgthumb_IMG_2497_1024.jpgthumb_IMG_2498_1024.jpgthumb_IMG_2499_1024.jpg
 

tank_rock said:
Hello! I'm actually a semi-visitor to this site, I recently bought a couple of rocks at a pet store with the intention of putting them in my fish tank, but first I wanted to confirm what they are! They were sold to me as "rainbow slate" which they do not seem to be...so if anybody could identify these rocks, I would be so grateful!

View attachment 1495787View attachment 1495788View attachment 1495789View attachment 1495790View attachment 1495791
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Looks like glass slag to me.
 

JM2855 said:
I would guess this to be a silver sulfide mineral- Thick bluish black mineral covering quartz from a vein outcrop at a known past producer of gold and silver mine. Anyone know what this black/bluish black mineral in a gold/silver vein would be?



View attachment 1494585
View attachment 1494908
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Why are you assuming it to be silver-sulphide, besides the known occurrence in the general area?
One sulphide rarely travels alone. When you say blue-black I think covellite. But it doesn't quite look right.

Do the usual tests.
 

I was assuming silver based on assay of the vein material in that picture with well over 200 ounces per ton Ag. (18 ppm Au). Will run a 41 element suite assay on it and see what I get. Thank you for the reply. We all appreciate you sharing your knowledge on this forum.



Eu_citzen said:
Why are you assuming it to be silver-sulphide, besides the known occurrence in the general area?
One sulphide rarely travels alone. When you say blue-black I think covellite. But it doesn't quite look right.

Do the usual tests.
Click to expand...
 

Last edited:
I believe this was found in Mariposa County California. I think its Serpentine, not sure though. Its soapy feeling and has little dark stones in it.15060090911251045909411.jpg1506009229050-1128377917.jpg
 

This was also found in Mariposa County california . I posted on the "what is it" forum and some believe it may be petrified bone.
IMG_20180103_224603_222.jpgIMG_20180103_224635_626.jpgIMG_20180103_224653_017.jpgIMG_20180103_224548_256.jpg
 

JM2855 said:
I was assuming silver based on assay of the vein material in that picture with well over 200 ounces per ton Ag. (18 ppm Au). Will run a 41 element suite assay on it and see what I get. Thank you for the reply. We all appreciate you sharing your knowledge on this forum.
Click to expand...

Well, that seems sound. I'd first go with Acanthite, simple because I believe it to be fairly common.
I'd attribute the blue tinge to oxidization, as a guess.

That said, many silver sulphides are very similar and from a picture alone little can be said.
 

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