Natural Science Forum / Earth Science / Mineralogy / April 2005

I have found an iron object, with what looks like a few fragments of
olivine embedded in it. They definitely look like olivine,
yellow and yellow-green fragments about 4-5 mm large, maybe
somewhat larger as they go into the iron.

Go to: http://www.cmpb.net/en/photonum.php
and there, click on: "A cheap macro/micro adaptor for a consumer digital camera"
Have fun! J.J.

I have found some translucent dark to light green rocks in the talledega al
area and would like to determine what it is.  One chunk is almost as big as
a softball.  some is pitted like bubbles of air was in it when forming.  If
you can help me Identify email me at ...

Ha
Look my meteorites collection: www.woreczko.pl/meteorites
Regards
Woreczko

Do any of you know of a rock/mineral/fossil, etc called Saint Brigets
Cross?  Not sure of the spelling.
My father used to find them in the Clinton Massachusetts when he was a
child, circa 1930s.

I'm looking for the details of how azurite forms.  I know the basics
-- sulfide ores oxidize to sulfates, sulfates + meteoric water +
dissolved CO2 make azurite (and malachite).  I'm interested, though,
in the specific mechanisms, and the exact chemical & mineral