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KDF-TX
Joined: 22 Jan 2008
Posts: 79
Location: Texas
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 Posted: Mar 10, 2010 07:17 Post subject: Re: Collection of Kevin Farrell |
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Hi Peter,
Are you saying you don't see the babingtonite because of the epitaxial film (or epitaxial layer) of hedenbergite?
I only have a 10x loupe but I don't see what is in your photo.
I would be interested in getting someone to take a closer look (pun intended) at this specimen.
Kevin
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KDF-TX
Joined: 22 Jan 2008
Posts: 79
Location: Texas
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| Posted: Mar 10, 2010 07:22 Post subject: Re: Collection of Kevin Farrell |
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| Tony L. Potucek wrote: | Hi, Kevin,
You may add Pine Canyon to the T&G prospect label. Most likely mined by Ray Demark and Mike Sanders, the former claim holders. This is the infamous Dick Jones locality that was at one time placed in Catron County to throw other diggers off the trail. Nice piece and thanks for sharing pictures of your nice collection. I am a geologist but not retired yet, so I can't give you anything : ) |
I found this reference to a locality for "favorite fluorites" - Pine Canyon Deposit, West Burro Mts, Burro Mountains District, Grant Co., New Mexico.
I assume the same. Interesting.
Thanks for the information.
Kevin
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Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 845
Location: Northeast Ohio
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| Posted: Mar 10, 2010 09:34 Post subject: Re: Collection of Kevin Farrell |
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| KDF-TX wrote: | Hi Peter,
Are you saying you don't see the babingtonite because of the epitaxial film (or epitaxial layer) of hedenbergite?
I only have a 10x loupe but I don't see what is in your photo.
I would be interested in getting someone to take a closer look (pun intended) at this specimen.
Kevin |
Hi Kevin,
No, I'm saying that I don't recognize anything in the picture you posted that looks like babingtonite. The hedenbergite, if present, can partly obscure the babingtonite, but I've never seen it completely hide the babingtonite. Babingtonite may be present - I just can't locate it in your image.
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Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Mar 10, 2010 11:09 Post subject: Re: Collection of Kevin Farrell |
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| Tony L. Potucek wrote: | Hi, Kevin,
You may add Pine Canyon to the T&G prospect label. Most likely mined by Ray Demark and Mike Sanders, the former claim holders. This is the infamous Dick Jones locality that was at one time placed in Catron County to throw other diggers off the trail. |
If your label states T&G prospect, it was collected by Tom Hales and his son Glenn, who depending on the version of the story, raided or didn't raid Ray and Mikes claim. Tom brought many of these to market in the early 1990s, selling out of the old La Quinta in Tucson.
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KDF-TX
Joined: 22 Jan 2008
Posts: 79
Location: Texas
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| Posted: Mar 12, 2010 12:10 Post subject: Re: Collection of Kevin Farrell |
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Thanks GneissWare!
Peter, I've looked up babingtonite and hedenbergite:
hedenbergite is black, dark green, green-brown; brownish green in thin section.
babingtonite is dark greenish black.
I don't see hedenbergite listed on Mindat in Passaic Co.
I realize it would be a guess by a photo... what is the black in the middle photo?
It's dull black and I don't see a green tint.
Thanks, Kevin
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KDF-TX
Joined: 22 Jan 2008
Posts: 79
Location: Texas
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| Posted: Mar 12, 2010 12:49 Post subject: Re: Collection of Kevin Farrell |
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Pete, I keep calling you Peter, sorry.
This label thing has me questioning many in my collection... "Ex ***** ***** Collection" and localities, not to mention the species.
I did buy a specimen just for the label a few times. One I recall had the locality as Hecho, Mexico.
99% of my collection were bought for under $100. Of the 99% probably 75% under $50 with most of those under $20. I started buying in the early 1970s when I got my first job. I have over 500 in a database (not including the flats under my bed and in a storage building and barn and all the petrified wood/palm).
I have kept my collection to the Americas. I don't know why, but that's how I started it and kept going.
Here's photos of one I purchased off Ebay (I rarely do Ebay anymore except from a very few trusted). I was curious to see the COA. This is what I got. Opinions?
Kevin
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7320 Time(s) |
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| limonite psuedo after pyrite, collected 1946, Dana Location |
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7327 Time(s) |
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Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 845
Location: Northeast Ohio
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| Posted: Mar 12, 2010 14:26 Post subject: Re: Collection of Kevin Farrell |
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| KDF-TX wrote: | Thanks GneissWare!
Peter, I've looked up babingtonite and hedenbergite:
hedenbergite is black, dark green, green-brown; brownish green in thin section.
babingtonite is dark greenish black.
I don't see hedenbergite listed on Mindat in Passaic Co.
I realize it would be a guess by a photo... what is the black in the middle photo?
It's dull black and I don't see a green tint.
Thanks, Kevin |
Those descriptions are good and reasonable. Hedenbergite, when it's in very thin hairs like it is in my photo, appears white, even though it would probably be dark if it were thicker. I'm not surprised that hedenbergite does not appear in the Mindat list for Passaic County - these hairs were earlier identified as something else, I think as acmite, which is a synonym for aegirine. But the identification as hedenbergite was done by a highly accomplished professional structural mineralogist, it's been published in several peer-reviewed papers, and I think there's no doubt about it. Mindat will catch up eventually.
As for the black in the middle photo, it's hard to see much detail, but it appears dull, earthy, and not particularly crystal-shaped. I don't know what it is - perhaps a chlorite mineral, perhaps a manganese oxide. But without a closer view of it, I can't see it as babingtonite.
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Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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