[Rockhounds] Winter Blah's Pop Quiz - What Was The Last Specimen Added To Your Collection?

[Jeffrey T. Cessna]

At 10:29 PM 2/5/2009, you wrote:

>         What Was The Last Specimen Added To Your Collection?

Purchased:

Willemite Zn2(SiO4) fl green SW/LW
Sphalerite (Zn,Fe)S  fl,ph yellow ?W
Calcite-(Mn) CaCO3 fl red SW
Hasselhojden, Grythyttan, Sweden
Size: 6.5x4x4 cm (144g)

It is still in the mail, from sweden, but I have really enjoyed the 
other fluorescents I have purchased from Kjell Gatedal (unsolicited 
endorsement) on eBay.

Collected (31 jan 09):

Potomac Marble (limestone conglomerate)
Leesburg Member, Balls Bluff Siltstone
Rt 15 N of Leesburg, Loudoun Co., Virginia

I collected several pieces, chosen for either interesting 
constituents or interesting patterns. I put down the piece with the 
intact 6 cm feldspar crystal and couldn't find it again. Often the 
stones making up the conglomerate are themselves pieces of weathered 
conglomerate. I found a 30 x 10 x 2.5 cm piece with half of one face 
covered with small milky quartz crystals from a later vein filling. 
If you can bring yourself to cut it, it will take a very nice polish. 
I have included a few links with more information.

http://www.mcmullans.org/geoweb/BasicPageListing/leesburg_member.htm

http://pubs.usgs.gov/gip/stones/stones3.html

pictures 
http://www.nvcc.edu/home/cbentley/geoblog/2008/05/western-conglomerates-culpeper-basin.html


Cheers,
Jeff


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