What is your favorite rock/mineral?

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TODSKI
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25 Feb 2007, 4:11 pm

Hi there. As a kid I used to spend hours digging. I found Mica to be facinating. Peeling them apart and peeling.....let go....LOL
Loved purple quartz too.
Oh, and is it slate? Grey rock, layers? Found trilobite fossils in them.
Which led to hours of rock smashing. And hours.

krex
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25 Feb 2007, 4:22 pm

"rocks"......first and longest lasting interest.Memory problems made memorizing the scientific names impossible for me but I love spending hours searching for fossils and "pretty rocks".....I live in MN,agates are easy to find around Lake Superior and elsewhere,moved by glaciers and (best place),Mall Parking lots... I will be hunting them down in the little parking lot isles
and have strangers ask me..."Did you lose something?"..........I use to reply "no"....now I say...."MY MIND"and laugh maniacally.

I also love fire agates,fire opals and Amber.

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Tim_Tex
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25 Feb 2007, 5:37 pm

The state mineral in Texas is some sort of agate.

Tim

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dgd1788
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25 Feb 2007, 5:48 pm

Obsidian, Jade, Granite and Limestone.

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NeoPlatonist
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25 Feb 2007, 5:52 pm

I have a piece of greenish quartz (I think) that I picked up off the ground a while back. I need to polish the surface to get the most out of it but I love it.

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Tim_Tex
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25 Feb 2007, 5:55 pm

dgd1788 wrote:

Obsidian, Jade, Granite and Limestone.

I cannot believe I forgot about Jade.

Limestone is everywhere in Houston. It is used in many buildings in here.

Tim

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tealclock
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25 Feb 2007, 5:59 pm

my favorites are black onyx, ruby, and topaz

black onyx pwns j00!! ! ^_^

Tim_Tex
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25 Feb 2007, 6:01 pm

tealclock wrote:

my favorites are black onyx, ruby, and topaz

black onyx pwns j00!! ! ^_^

I can't believe all the pretty ones haven't crossed my mind yet.

Tim

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ahayes
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25 Feb 2007, 7:48 pm

Quartz.

Tim_Tex
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25 Feb 2007, 7:50 pm

Tim_Tex wrote:

dgd1788 wrote:

Obsidian, Jade, Granite and Limestone.

I cannot believe I forgot about Jade.

Limestone is everywhere in Houston. It is used in many buildings in here.

Tim

Unfortunately, there is always the occasional sinkhole associated with limestone. The area near the Medical Center/Reliant Stadium/Astrodome area is the most likely part of Houston for sinkholes.

Tim

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TruenoBlues
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25 Feb 2007, 7:54 pm

Ah, but you can always excavate a wine cellar out of limestone.

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TheMachine1
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25 Feb 2007, 9:49 pm

T-rav20 wrote:

Fused quartz is quite a bit more than 'mere' glass
http://en.wikipedia.org/wiki/Fused_quartz

Quote:

Fused quartz and fused silica are types of glass containing primarily silica in amorphous (non-crystalline) form

Thats my point heating the quartz sand which is primarily a crystalline product to a high enough temperature in earth's gravity (and not in a special solution under pressure with a seed crystal) will result in primarily amorphous silicon dioxide which
does meet the definition of mere glass. Since its the simplest glass mixture. More common glass will have additional additives.

Xenon
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25 Feb 2007, 10:43 pm

My favourite is amethyst quartz.

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