El Paso Mineral and Gem Society
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-HtoUWCrMTkOKCOvAqEOV2zoNKXEgBp08hMSmSKkr0ReSo-KgYA9ybDdFW3VOHPiNsD1giPD-8_Siq-i3tKKlbeN9kYTmVVrB3W7BUXKp4ovOj4IFAt99eZNzm_Ti_AUxJS1PPnMZNT0/s320/Geode+Composite+Deming+NM.jpg)
The El Paso Mineral and Gem Society had a fund-raising auction last night.
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From my collection I donated a nice amethyst geode, the petrified wood that I recently found near my house, and a piece of chalk with fluorescent calcite from the formation bordering the English channel. Like at Dover, but on the French side. ![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFjE-opEJgIOpIjxK6w4hYkgWSN0IXSop2fxqnCS45rVP4JNMUy9UgQF71vBDgCWmXpWoItpL2uFmD_jdC0VWee6Z3WAjAcYGEPKoHTtu9c_mtsmLON4c9H8bvfE5Mito9RQEPW_xVxjw/s200/FossilLeaves.JPG)
I bought some nice things in the auction - and CHEAP too!
I got one half of a geode recently found near Deming, New Mexico USA. Look closely at this under shortwave ultraviolet light and you will see in the top right hand
corner a small bit of calcite that fluoresces red.
I bought some nice things in the auction - and CHEAP too!
I got one half of a geode recently found near Deming, New Mexico USA. Look closely at this under shortwave ultraviolet light and you will see in the top right hand
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiopsBQPS8_sBQ7uzc8rdviEnjOOU6pi3jLurxlqYohIWSFZ1soR-T3-k6lwPQaOQ-sg9Z1K6jI8xf4x_N33ejP6SfUe1BZyASWJgWxw_U12SYahIVrEYf___jFIg-E0gFHnCABYOGEhnI/s320/geode+SW+UV.jpg)
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NOTE: Click on the pictures and they will enlarge
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The green fluorescence is trace amounts of uranium in the silicon dioxide. You can see the bands (sort of like tree rings) where it was deposited in layers.
I also got a couple of pieces of fossilized plants out of England, and a cut slab of ancient “little critters.”
Also a couple of cut slabs of fossilized palm tree wood from East Texas, and some dog tooth calcltie which barely fluoresces at all.
I also got a couple of pieces of fossilized plants out of England, and a cut slab of ancient “little critters.”
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And a friend gave me a nice big piece of mahogany obsidian.
These rocks plus several more which I gave away cost me a total of $10-. What a deal.
These rocks plus several more which I gave away cost me a total of $10-. What a deal.
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