All of these are rough agates found on the beach. All of them show evidence of being agate from the outer surface. In fact, this is true for probably 99 percent of beach agates. This first photo clearly shows banding-- but the banding was only showing in one spot.
Pit marked surface, red color, translucency, waxy luster....
Banding with red color....
More banding.....
Gray color, banding, botryoidal structure....
Banding, waxy luster, chromatographic color change, .....
Waxy luster, banding....
Waxy luster, pit marked surface, botryoidal structure....
Pit marked surface, gray color, waxy luster, yellow limonite, iron red inclusions....
Gray chalcedony color, banding, waxy luster...
Pit marked surface, gray color, waxy luster, yellow limonite...
yellow limonite, gray color, waxy luster ...
Banding, yellow limonite, waxy luster, gray chalcedony...
Banding, peeler erosion of bands....
Waxy luster, swirl banding, gray chalcedony, iron oxide color...
Peeler structure, waxy luster...
Banding, waxy luster...
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