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Let's Rock => Identifications of Materials => Topic started by: 55fossil on July 28, 2018, 07:43:28 PM

Title: what are they, 3 pieces ???
Post by: 55fossil on July 28, 2018, 07:43:28 PM

   Probably well known to some, not me.   Any help / ideas greatly appreciated.

First piece is radiating arms. Material is similar to an opal or soft agate. Does not fizzle in muratic acid. Softer than agate. Back side shows some host material. Could just be a t-egg center, but what type of rock????

Title: Re: what are they, 3 pieces ???
Post by: irockhound on July 29, 2018, 01:02:12 AM

Looks like sprays of aragonite or barite to me.

Title: Re: what are they, 3 pieces ???
Post by: 55fossil on July 29, 2018, 06:38:07 AM

   thanks, I shall start looking up examples to compare

Title: Re: what are they, 3 pieces ???
Post by: Sandsave on July 29, 2018, 05:04:06 PM

I 2nd the barite

Title: Re: what are they, 3 pieces ???
Post by: ToTheSummit on July 30, 2018, 12:19:54 PM

Also reminds me of the actinolite we have around here.  Perhaps yours is not as green though.