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Author Topic: Orb crystal formation in calcite? spherulitic calcite?  (Read 3953 times)

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Kaljaia

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Orb crystal formation in calcite? spherulitic calcite?
« on: March 06, 2016, 10:39:31 PM »
Found this today in proximity to the source of a nice black stone (that seems to be a metamorphic, found in proximity to two layers of tuff and what appears to be a mud/ash deposit with iron nodule geologyisconfusingincentraloregon better pictures when I get back there with camera.) I've never seen anything like it here before but some other pieces had a seam-agate-ish appearance, like a lace that forgot a component somewhere and is just the structure, without the quartz.

Editing to add: I learned a new word tonight. 'spherulitic calcite.'
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- Erika

I rock hunt in the Antelope/Ashwood area of the John Day river basin in Oregon.

Gergis

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Re: Orb crystal formation in calcite? spherulitic calcite?
« Reply #1 on: March 08, 2016, 07:23:16 AM »
Reminds me of birds eye rhyolite kinda. Cool looking stuff!

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