Natural Science Forum / Earth Science / Mineralogy / December 2003

I don't know the first thing about mineralogy, so I ask you.
What could this stone be?
I have found it near a quarry in Nordrhein-Westfalen / Germany.
http://www-users.rwth-aachen.de/peter.fidler/Stein.jpg

first off i would like to thank all the people that helped me
including jo and 1 lucky texan. i was wondering if there are any geode
collecting sites in colorado.and how you can tell if they are there.
if you could help me i would be nothing but grateful. P.S I'll stop

I have heard of a vug, but am a little green in the rock collecting
hobby so if you could give me some idea i would be more than grateful.

there is an abundance of quartz on the ground on a larger mountain in
colorado. I was wondering if there is a possibility for geodes and if
so would i need to dig??? any information you can give me would help,
i dont know anything about them thank you,.......Sterling Jones

A list of the top-selling online scientific books
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http://www.jupiterscientific.org/sciinfo/bestbooks.html
Readers of this newsgroup should find this information useful

Dear all;
I'm looking for help in my search to establish a quality monitoring
system for a local Silica Sand plant project.
I up to my ears digging in literature and the net for Standards to