Minerals and rocks and fossils

Advanced Lighting Techniques for Mineral photography

nobody@flickr.com (someHerrings) — Wed, 25 Apr 2012 03:38:27 -0700

someHerrings posted a new topic:

mineralogicalrecord.com/pdfs/Advanced%20Lighting%20Techni...

Reply to Any ideas what this is? Im stumped

nobody@flickr.com (Utah~Dave AA7IZ) — Sat, 16 Jul 2011 02:19:44 -0700

Second guess for Magnatite or Hemaite.
A streak test would tell for sure. The streak of Hematite is Blood Red, while the streak of Magnatite is Black.
I wonder if it has any magnetic properties of it's own?

Reply to Any ideas what this is? Im stumped

nobody@flickr.com (mariolazz) — Sat, 11 Jun 2011 11:03:55 -0700

mariolazz posted a reply:

I guess magnetite and/or hematite.
Mario

Reply to Any ideas what this is? Im stumped

nobody@flickr.com (L2Explore24) — Wed, 08 Jun 2011 13:20:28 -0700

L2Explore24 posted a reply:

Oh yea, and I decided to put a magnet up to it to see if it was in fact a metal. It is. The magnet stuck to it pretty well.

Any ideas what this is? Im stumped

nobody@flickr.com (L2Explore24) — Wed, 08 Jun 2011 09:04:52 -0700

L2Explore24 posted a new topic:

Found in Southwestern Montana. Very Heavy for its size and has a blueish metallic luster. Cant figure out what it is.

www.flickr.com/photos/mtnjpa/5812321252/in/photostream

www.flickr.com/photos/mtnjpa/5812321578/in/photostream

www.flickr.com/photos/mtnjpa/5812321912/in/photostream

Any help would be greatly appreciated. Thanks

Reply to Green Mystery Rocks

nobody@flickr.com (Welsh Icons (Dom)) — Sun, 05 Jun 2011 18:36:03 -0700

Welsh Icons (Dom) posted a reply:

I do not know the geology of the area but I tend to agree with Mario that they could well be jasper. I would suggest a streak and a hardness test - no joke intended

Reply to Green Mystery Rocks

nobody@flickr.com (Becky Simmons) — Sun, 05 Jun 2011 16:31:36 -0700

Becky Simmons posted a reply:

Mariojazz- I have not seen anything that looks like pyrite in these- the tiny area of crystals in the larger one looks more quartz-ish. I'm glad you like the image- I wasn't sure about it & haven't tried to photograph rocks before- so Thank You!
-Becky

Reply to Green Mystery Rocks

nobody@flickr.com (mariolazz) — Sun, 05 Jun 2011 10:32:54 -0700

mariolazz posted a reply:

Hi Bechy,
I do not think it is chert, I cannot see the tipical concoidal fracturation, I think it could be mor likely jasper. Hav you seen any pyrite or other sulfide little cristals in those samples??
Anyway good shots and very nice samples.
Thanks, Mario

Reply to Introduction

nobody@flickr.com (Becky Simmons) — Fri, 03 Jun 2011 16:13:34 -0700

Becky Simmons posted a reply:

Hello! I am new to the group & live in Humboldt, CA (very northern CA). We have a ton of rocks around here- at the beaches, rivers, etc.- & I started collecting once we moved here. I a, fascinated by the colors and textures in each rock & have only recently began identifying them. I am finding this somewhat difficult as I am native to Georgia so I don't recognize much of anything...

Green Mystery Rocks

nobody@flickr.com (Becky Simmons) — Fri, 03 Jun 2011 16:09:35 -0700

Becky Simmons posted a new topic:

I need some help trying to identify these rocks. I found them in Northern CA (just outside Carlotta, CA) at Swimmers Delight on the Van Duzen River. I have asked around but everyone seems to give me a different answer! Thanks in advance for any insight you can offer me!!

For the large rock:
-Soapstone (I don't think so b/c it has crystals & is pretty hard)
-Japser
-Chert (this seems to be the leader in opinions right now)
-Serpentine

For the smaller rock:
-Jasper
-Green Obsidian (I didn't think obsidian could be milky)
- Chert