Which stone is this:

Name:  IMG_6795.jpg
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Size:  33.3 KBName:  IMG_6796.jpg
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Size:  42.8 KBName:  IMG_6798.jpg
Views: 1005
Size:  46.4 KBName:  IMG_6799.jpg
Views: 1021
Size:  30.2 KB


Any idea anyone? Any other stones like this out there?