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Ken
Joined: 14 Jul 2011
Posts: 54
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Posted: Mar 22, 2020 23:09 Post subject: Strange hexagon shapes in rocks |
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I had seen these things several time before in a number of other stones but never took a close look at them. I came across one that seemed larger than the rest so I decided to check it out. I'm not sure what to make of this, it look like a host of maybe garnets fragment grouped in a hexagon shape. Anyone know what this is and why?
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1347
Location: Cambridge
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Posted: Mar 23, 2020 00:30 Post subject: Re: Strange hexagon shapes in rocks |
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I would go with garnets
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Ricky hartzog
Joined: 13 Mar 2020
Posts: 33
Location: Saltville Virginia
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Posted: Mar 23, 2020 13:01 Post subject: Re: Strange hexagon shapes in rocks |
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Where was it found ?
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Ken
Joined: 14 Jul 2011
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Posted: Mar 23, 2020 23:33 Post subject: Re: Strange hexagon shapes in rocks |
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These were found in the California desert. I came across a lot of other stones that had these small gemstones inside so I dug a lot of them out. I think these are garnets too, you can pick up most of these with a magnet.
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Bob Carnein
Joined: 22 Aug 2013
Posts: 327
Location: Florissant, CO
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Posted: Mar 24, 2020 10:08 Post subject: Re: Strange hexagon shapes in rocks |
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Weak magnetism is common in garnets and varies according to composition. It can be produced either by inclusions of minerals such as magnetite (sometimes caused by exsolution) or metal ions (e.g. Fe, Mn, Cr) that are an integral part of the crystalline structure. The first photos you posted appear to have opaque inclusions that might be magnetite.
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