Lapidaryforum.net

Let's Rock => Mineral Specimens => Topic started by: Kaljaia on March 06, 2016, 10:39:31 PM

Title: Orb crystal formation in calcite? spherulitic calcite?
Post by: Kaljaia 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.'

Title: Re: Orb crystal formation in calcite? spherulitic calcite?
Post by: Gergis on March 08, 2016, 07:23:16 AM

Reminds me of birds eye rhyolite kinda. Cool looking stuff!

Sent from my LGLS990 using Tapatalk