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Let's Rock => Identifications of Materials => Topic started by: whartongriff on February 10, 2020, 03:42:04 PM

Title: Found on a gravel bar
Post by: whartongriff on February 10, 2020, 03:42:04 PM: Found several 12 to 24" pieces of this in a central texas river about 45 minutes from the gulf. Diameter is about 4". Outside looks like a worn down oak log. Cut the end off with a slab saw and not sure what it is. Any ideas? Thanks. -John(https://uploads.tapatalk-cdn.com/20200210/7ed9f32291eca6546c17434077719138.jpg)(https://uploads.tapatalk-cdn.com/20200210/7753030556648d20d5be804148b39b43.jpg)(https://uploads.tapatalk-cdn.com/20200210/91ce3ab51391800ecef28faa69c0392b.jpg)

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Title: Re: Found on a gravel bar
Post by: whartongriff on February 25, 2020, 05:33:35 AM: It's been identified! Calcite limb cast.

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Title: Re: Found on a gravel bar
Post by: irockhound on February 25, 2020, 08:48:57 AM: A little confused by the identification. Are they saying that what you have is a limb cast made of Calcite? It is clearly an agate and not calcite so are they saying that it is a limb cast that replaced with calcite and then the calcite eroded and it was replaced with agate a 2nd time?
Title: Re: Found on a gravel bar
Post by: whartongriff on February 26, 2020, 05:32:48 AM: I was told it is a limbcast made of calcite. I don't know, I'm new to this. I don't think it is agate. It is neither transluscent or banded. After looking at pictures online, I think it is definitely a limb cast. Open to suggestions on what mineral or minerals this is composed of.

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Title: Re: Found on a gravel bar
Post by: irockhound on February 26, 2020, 04:06:59 PM: You will get mixed answers from Jasper to Agate. Definitely not Calcite though.
Title: Re: Found on a gravel bar
Post by: whartongriff on February 26, 2020, 05:06:17 PM: Thank you. I appreciate it.

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