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Let's Rock => Identifications of Materials => Topic started by: 55fossil on February 21, 2019, 05:59:21 PM

Title: Morrisonite?? Polychrome?? please help ID cabochon
Post by: 55fossil on February 21, 2019, 05:59:21 PM

    I was sold a slab and told it was Morrisonite. I just am not positive if it is Morrisonite. I do like it....  help please ID

Title: Re: Morrisonite?? Polychrome?? please help ID cabochon
Post by: hummingbirdstones on February 21, 2019, 06:58:51 PM

I can't say for sure, but it sure looks more like Polychrome than Morrisonite to me.  I've never cut Polychrome, but I have Morrisonite and I've never seen Morrisonite with that type of pattern in it.  I did look up images of Polychrome and there were a few that looked very similar to the colors and patterns in your stone.

Title: Re: Morrisonite?? Polychrome?? please help ID cabochon
Post by: finegemdesigns on February 21, 2019, 08:03:13 PM

Definately a B Grade Morrisonite. I've never seen Polychrome Jasper (also known as Misty Mountain Jasper) with these colors or patterns.

Title: Re: Morrisonite?? Polychrome?? please help ID cabochon
Post by: Enchantra on February 23, 2019, 09:37:20 AM

I second the ID of B Grade or even C grade Morrisonite.

Title: Re: Morrisonite?? Polychrome?? please help ID cabochon
Post by: 55fossil on February 23, 2019, 04:00:30 PM

Well, thanks for the response, I think.  The pain of sharing.   I am going with Polychrome ………….    Just googled pictures of Polychrome again and the colors are so correct.   for C grade crap LOL

Title: Re: Morrisonite?? Polychrome?? please help ID cabochon
Post by: irockhound on February 26, 2019, 11:02:56 PM

My 2 cents.  Grading system AAA AA A B C?  it is a great pattern and obviously takes a high polish like the other top grades.  Sometimes you get a AAA cab out of mine run.  Very nice cab regardless of the grade it came from.