Natural Science Forum / Earth Science / Mineralogy / March 2006

It'll be a snap to identify gemstones once Robert Downs finishes his
library of spectral fingerprints for all the Earth's minerals.
Downs is almost halfway there. So far, the associate professor of
geosciences at The University of Arizona in Tucson has cataloged about

does any one out there know what kind of adhesive is used to put two pieces
of stone together. Example I seen rutilated quartz on top of lapis. I wanted
to know how they put them together. Anthony

I'm looking for some one who could tell me if a stone that has been
stabilized could eventually start to break down and start to crumble. thanks
Anthony

I've done inversion of mise-a-la-masse data, and the result is 3-D
subsurface resistivity distribution. Since the inversion is using
finite difference scheme, subsurface is divided into lots of blocks,
each block has homogeneous resistivity. The result looks like this (for

does anybody in the group know anything about different types of
petrified wood?
http://community.webtv.net/sja6160/doc
THANKS!