[Rockhounds] Calcite

[Kreigh Tomaszewski]

I wish I had said that.		;-}

I have some "Christmas Calcite" that has alternating red and green 
stripes visible on some surfaces. I understand it is due to sub-surface 
cracks, with lightwave length gaps, that produce interference, much 
like oil slicks on water.

Kreigh





On Monday, Dec 8, 2008, at 07:02 America/Detroit, William Dicks wrote:

> John:
>     You could label it with my name and address and ship it "overnight
> express"!!!!:-))
>
>>>> john at pandemoniumgraphics.com 12/06/08 6:56 PM >>>
> I've got a handsome calcite on stilbite from Coffin Butte, OR (one of
> many).
> In the proper light it shows a rainbow. How should I label it? I'm
> thinking
> prismatic perhaps?
>
> John
>
>
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