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

Eu_citzen

Gold Member
Sep 19, 2006
6,484
2,111
Sweden
Detector(s) used
White's V3, Minelab Explorer II & XP Deus.
Primary Interest:
Prospecting

Eu_citzen

Gold Member
Sep 19, 2006
6,484
2,111
Sweden
Detector(s) used
White's V3, Minelab Explorer II & XP Deus.
Primary Interest:
Prospecting
I totally grasp that but all quartz I have WILL NOT make the Diamond detector go off even a little bit if I have it set to four bars and put it on a piece of quartz turn it every direction it will not hit in the red but I have a pile that does. I know in the synthetic world there are several synthesized minerals that can make it go off, but all of these have been found in nature on their own nowhere near a spot that it could be made synthetically. I've been trying to research whether white topaz or white sapphire can make a diamond detector go off but have no avail to find any information on that

Diamond detectors are known to be unreliable. They are used in jewelery shops to test for diamond imitations, not used among rock hounds.
To put it frank: You are using it in a way it is not intended and wondering why it's not working as intended.:occasion14:

BTW, yes, white topaz and sapphire can both make the tester go off. In a gemological context, further testing is required.
 

ThermoCat

Newbie
Apr 29, 2018
3
0
Primary Interest:
All Treasure Hunting
Thought these looked interesting.

20170713_172015.jpg 20170713_172651.jpg 20170713_172359.jpg
20170713_172525.jpg 20170713_172702.jpg
 

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llkrea

Tenderfoot
Apr 28, 2018
9
8
Menomonee Falls, WI
Primary Interest:
All Treasure Hunting
When I google image searched it the only thing close were what I think were diabase. The difference is that my rock is all the same color and doesnt look like strips of other types of rock mixed in possibly creating the grooves. There was one other rock about the same size next to it on the river bank. But none others found (not even smaller ones) within hundreds of feet.
I left them there, should I go get them and bring them to a geologist? tmp_27324-20180428_1637061829348137.jpg tmp_27324-20180428_1636241538256950.jpg
 

Eu_citzen

Gold Member
Sep 19, 2006
6,484
2,111
Sweden
Detector(s) used
White's V3, Minelab Explorer II & XP Deus.
Primary Interest:
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Eu_citzen

Gold Member
Sep 19, 2006
6,484
2,111
Sweden
Detector(s) used
White's V3, Minelab Explorer II & XP Deus.
Primary Interest:
Prospecting
When I google image searched it the only thing close were what I think were diabase. The difference is that my rock is all the same color and doesnt look like strips of other types of rock mixed in possibly creating the grooves. There was one other rock about the same size next to it on the river bank. But none others found (not even smaller ones) within hundreds of feet.
I left them there, should I go get them and bring them to a geologist? View attachment 1584568 View attachment 1584567

Use a magnifying glass or even loupe and I think you'll find there are "grains" of other "minerals" in there. (diabase is a rock made of several minerals)
I can just seem them in the photo at max enlargement.
 

Smokehouse_83

Jr. Member
Jan 28, 2018
91
33
Primary Interest:
All Treasure Hunting
Don't you know the test procedure by now?:occasion14:
Hardness & streak test!

Streaks red. Also has little strips of reflective material in it. The picture doesn't do it justice it looks like a rainbow. It's just a crust on what looks like sandstone.
 

Bldr

Newbie
Apr 30, 2018
2
0
Primary Interest:
All Treasure Hunting
Hi! Very interesting rocks I see here! I would appreciate if someone could share their vast knowledge to help me identify this rock I found over 30 years ago. It may not look so difficult but I found it in a field on the east side of San Antonio, it definitely did not belong there.
1.jpg
2.jpg
3.jpg
4.jpg
 

arizau

Bronze Member
May 2, 2014
2,479
3,854
AZ
Detector(s) used
Beach High Banker, Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and home made fluid bed and stream sluices.
Primary Interest:
Prospecting
Hi! Very interesting rocks I see here! I would appreciate if someone could share their vast knowledge to help me identify this rock I found over 30 years ago. It may not look so difficult but I found it in a field on the east side of San Antonio, it definitely did not belong there.
View attachment 1584888
View attachment 1584889
View attachment 1584890
View attachment 1584891

The picture looks like lava. There was a "very explosive" volcano in the Austin area so maybe it is a lava bomb that was ejected from that volcano or maybe a closer one that long ago eroded totally away. Check this link or google volcanoes in texas. https://www.google.com/search?q=anc...ome..69i57.16405j1j7&sourceid=chrome&ie=UTF-8
Also this one. https://www.google.com/search?q=lav.....69i57j0l5.9781j0j7&sourceid=chrome&ie=UTF-8
 

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Bgonleif

Jr. Member
Nov 6, 2017
34
14
Primary Interest:
All Treasure Hunting
Ok so i did a s.g. on some of the rock and yes u are 100% correct about false reading, especially on raw material. But when s.g. weighing is involved there's no way to misidentify minerals, unless major impurities or inclusions, am I correct? None the less none of which came up as 2.65s.g.(quartz) they came up as 2.62(albite) and 2.7-2.81 which I would suspect to be beryl family. How do I gain more Knowledge and/or ability to know what I have so I can sell anything
 

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