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| Search found 9 matches |
| Author | Message |
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 Topic: How to clean clay off large (pyrite) specimens?? |
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| lidaasteria Replies: 4 Views: 9721 |
 Forum: Conserving, Preparing and Cleaning Minerals Posted: Mar 28, 2014 11:30 Subject: How to clean clay off large (pyrite) specimens?? |
| We've been finding some nice pyrite specimens lately. Some of them look like any other geode that comes out of these shale walls, and others are pure chunks of pyrite.
My question is, the matrix th ... |
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| Topic: Black dogtooth calcite? (oil) |
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| lidaasteria Replies: 7 Views: 10305 |
Forum: Minerals and Mineralogy Posted: Feb 18, 2014 12:28 Subject: Re: Black dogtooth calcite? (oil) |
| After soaking, and scrubbing in both mineral spirits and gasoline, most of the black coloration remains. I'm guessing the hydrocarbons are actually inside the crystals, as opposed to just filling crac ... | |
| Topic: Black dogtooth calcite? (oil) |
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| lidaasteria Replies: 7 Views: 10305 |
Forum: Minerals and Mineralogy Posted: Feb 18, 2014 08:23 Subject: Re: Black dogtooth calcite? (oil) |
| I've got another question....Is this what is referred to as "black calcite"? Or is that actually calcite that formed with some other trace mineral? | |
| Topic: Black dogtooth calcite? (oil) |
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| lidaasteria Replies: 7 Views: 10305 |
Forum: Minerals and Mineralogy Posted: Feb 18, 2014 08:18 Subject: Re: Black dogtooth calcite? (oil) |
| Thanks for pointing that out...you're definitely right. The picture below is the dogtooth we usually find. | |
| Topic: Black dogtooth calcite? (oil) |
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| lidaasteria Replies: 7 Views: 10305 |
Forum: Minerals and Mineralogy Posted: Feb 18, 2014 07:32 Subject: Black dogtooth calcite? (oil) |
| We've seen calcite that has oil in it (thus turning it brown/black) but nothing quite like we found yesterday.
It was a large limestone boulder with a small black cavity in it (about the size of a ... |
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| Topic: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
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| lidaasteria Replies: 6 Views: 9812 |
Forum: Minerals and Mineralogy Posted: Feb 18, 2014 07:14 Subject: Re: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
| I've heard of that...will have to try:) | |
| Topic: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
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| lidaasteria Replies: 6 Views: 9812 |
Forum: Minerals and Mineralogy Posted: Feb 14, 2014 12:44 Subject: Re: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
| The following two pictures are oriented correctly... | |
| Topic: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
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| lidaasteria Replies: 6 Views: 9812 |
Forum: Minerals and Mineralogy Posted: Feb 14, 2014 12:28 Subject: Re: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
| Yes, I took the three pictures separately, and they're probably not oriented the same.
When I photographed it under UV, I noticed that the red coloration is coming from the black sphalerite. But it ... |
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| Topic: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
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| lidaasteria Replies: 6 Views: 9812 |
Forum: Minerals and Mineralogy Posted: Feb 14, 2014 10:08 Subject: Help identifying...Baryte, Calcite, Sphalerite...Pyrite? |
| Hello all.....
We've been finding quite a mix of specimens that come out of the Walker Vein (Boyle County, KY..Caldwell quarry) We can identify Baryte, calcite, sphalerite...but having trouble d ... |
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