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Post by jakesrocks on May 30, 2012 11:31:38 GMT -5
Fossil Coral from the Ecofina river area, Florida. I'll set up my light tent for a better pic.
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Post by helens on May 30, 2012 11:53:22 GMT -5
Cool Don!!! I don't like the gnarly looking little pieces as much as the giant fish egg bubbles, but that's a nifty looking piece:).
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Post by jakesrocks on May 30, 2012 12:10:45 GMT -5
Actually Helen, this piece has a lot of those bubbles in it. Just a poor pic that doesn't show them. Some of the chalcedony bubbles have a light coating of common opal.
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Post by helens on May 30, 2012 13:03:12 GMT -5
Oohh.. I see the bubbles in the pockets! Very nice varied specimen you picked!!
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Post by Pat on May 30, 2012 15:08:51 GMT -5
Very nice! The blue is gorgeous. We bought a couple Florida Coral specimens years ago --- at a garage sale in Oregon! I was hooked then!
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garock
fully equipped rock polisher
Member since February 2006
Posts: 1,168
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Post by garock on May 30, 2012 17:29:22 GMT -5
Nice specimen !! I did not know that the Econfina River in Florida had coral specimens. I have searched the Withacoochee River in Georgia and found some good stuff especially the flint. Thanks for sharing !!
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Post by jakesrocks on May 30, 2012 18:17:29 GMT -5
Here's the info I pulled from the add for this piece.
QUARTZ var. CHALCEDONY (Agatized Coral) Mossey Hammock Grade near Econfina Landing Taylor County, Florida, USA
Cabinet Matched Pair (8.5 x 5.9 x 2.4 cm & 9.0 x 5.8 x 3.3 cm)
This is a rare specimen from the long-closed Perry North Florida locality which was open briefly during the early 1970s. Translucent tea-colored fortification agate with gray banding defines an internal botryoidal void space, coated in places with white to tan common opal. This specimen is split down the middle by an external channel, likely the result of pre-silicification clam borings. The geode pockets wraps around the back side of this feature. Fluorescent (and slightly phosphorescent) yellow under longwave, midwave and shortwave UV light. Collected from the St. Marks Formation (lower Miocene)
The fortification banding doesn't show up under normal light, but really pops out under UV.
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Post by helens on May 30, 2012 23:35:21 GMT -5
Is it possible to take a pix under UV lights? Hopefully this summer, we can get up to Northern Florida to do some poking around ourselves:).
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Post by jakesrocks on May 30, 2012 23:38:01 GMT -5
I only have an old hand held UV light, but I'm gonna try to make a stand for it. Don't know how good my camera will be shooting in near total darkness.
Just did a quick google search. There are quite a few articles on taking pics under UV light. I'll need to do some reading in the morning.
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