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 Post subject: New Emerald Locality in Southrn California
PostPosted: Fri Aug 20, 2021 10:59 pm 
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This is right in your backyard 1bwana1, right? We're expecting a guided tour. :wink:

Aaron J. Celestian and Richard Edley for G&G wrote:
Located about 60 miles east of San Diego, a new emerald deposit has been discovered in the Julian Mining District (figure 1). This area is known for pegmatite mines and hydrothermal mineral deposits; however, none of those are known to have produced emeralds to date. The emeralds (example shown in figure 2) were all collected by author RE and son Bruce Edley near the surface and are embedded in a biotite schist host rock. Most of the recovered single crystals have a translucent dark green color and inclusions, and they are typically smaller than 2 cm. A few light-colored green beryl crystals have been recovered from a nearby pegmatite. Their formation was likely correlated with metamorphic and hydrothermal processes associated with regional tectonism.




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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Fri Aug 20, 2021 11:15 pm 
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Yes, I was aware of that find. However, I have not yet had a chance to go and see it for myself. It is on my list of things to do.


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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Sat Aug 21, 2021 2:49 am 
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Very cool! First the several in NC, then that little one in Montana and now California. I'm sure I am forgetting some other small US emerald locale here too.

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Sat Aug 21, 2021 3:48 am 
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I guess I missed the Montana one. Any links?

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Sun Aug 22, 2021 4:53 am 
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allen wrote:
I guess I missed the Montana one. Any links?


http://www.johnbetts-fineminerals.com/j ... p?id=49671
http://www.johnbetts-fineminerals.com/j ... p?id=49665
Emerald from Broken Trail Battlestar Mine, Rock Creek, Mineral County, Montana

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Sun Aug 22, 2021 4:15 pm 
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Thanks daniele. I would be more inclined to call that green beryl than emerald. I have collected better specimens myself at Railway Dyke in Washington.

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Mon Aug 23, 2021 7:37 pm 
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Perhaps a better link:
https://www.mindat.org/locentry-738863.html


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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Mon Aug 23, 2021 8:10 pm 
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OK, makes sense now, thanks.

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Wed Oct 27, 2021 12:25 pm 
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I'm in that area all the time as my parents live about 10 miles away in Ramona and would love to visit, however I do not know any of the mining claim owners in that area and it is all private land.

1bwana1 - If you end up going, please shoot me a message and I'll happily tag along and bring refreshments :)

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Wed Oct 27, 2021 9:56 pm 
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Paul,

I sense a field trip coming. Lets find out where it is and go. I love finding new deposits.

I will start making some inquiries with the local mineral hounds.

Maybe Greg is in too?

My instincts say that we will be looking for the Emerald in a contact zone between the Julian Schist, and a pegmatite intrusion. Probably in and area with coarse grain Biotite mineralization.

Just the kind of thing my portable RAMAN Spectrometer was designed for.

See map: https://pubs.usgs.gov/of/1994/0016/pdf/ ... mphlet.pdf


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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Thu Oct 28, 2021 1:33 am 
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Unless it is in the Gem Trails of Southern California I am not much help in locating a Emerald from a schorl, geologically speaking. I can most definitely carry water, have a couple of Horst's mining picks.
I know someone that might be of help, I am sure both of you know who he is. I'll reach out to him and see what he knows.

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Thu Oct 28, 2021 10:55 am 
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I'm up for a field trip anytime!

I won't be much help in the geology aspect, but I can carry supplies and dig enthusiastically :lol:

If we were able to get something set up, I imagine Nathan and a couple of my other co-workers in the lab may be interested as well.

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 Post subject: Re: New Emerald Locality in Southrn California
PostPosted: Thu Oct 28, 2021 7:57 pm 
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Ok, I am going to start researching to get us close. Get your Pith Helmets ready, we are going on Safari...


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