Wednesday, September 10, 2008

Five most important minerals

Here is a good question for all.

What are the five most important minerals to know and why?

One answer is here>
All of My Faults Are Stress-Related

What do you think?

Quartz
Calcite
Clay minerals
Feldspar
Olivine
Ice

Pick your favorite five.

Harry Allen

1 comment:

TL STEINBORN said...

I vote for quartz, olivine, feldspar, pyroxene, clays. Of course, once you get a little way into the crust, the clays go away, followed by quartz and feldspar. Olivine and pyroxenes increase, and metal oxides and sulfides increase.