Original Message:   Can anyone explain the obvious undercutting...
...between the white ridges of the fortification pattern? Quartz is pretty hard - 7 - so it seems it would take something like carborundum to grind the softer layers away like that. None of the other examples presented seems to show this effect. The effect kind of reminds me of a piece of lox. Danny? Copyright 2024 All rights reserved by Bead Collector Network and its users

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