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diffraction grating: Fossil Barnacles on Agate bed


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Here was a nice surprise. I picked up this fossil cluster of barnacles and noticed a nice layer of agate underneath! When I processed the photo I took of it, I saw that the light from my flash dispersed giving this rainbow effect. It's very small but now when I hold to the light I can see the little rainbows! I heard this process is called diffraction grating. I would like to polish the agate but I think the rainbows will go away once the material is flattened.

agatebarn1.jpg

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How neat!

Could that be calcite, rather than agate?

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Looks like a mess to me, but Im with Auspex, could that be calcite?

 

RB

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