Whilst checking out the Quartz Cavern biome name change in a testing world, I found these floating polypite quartz crystals, and figured I would report them. These were found at position 260, 60, 200 in a Nether generated with seed 2956899278181509878 with Better Nether and Tech Reborn affecting Nether generation. Given that Tech Reborn only adds ores, if this cannot be reproduced with just Cinderscapes enabled, it may be a Better Nether issue.

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Here's an extreme example of this surrounding a Better Nether Nether City. They extend onward for chunks, like a starfield..~

Yeah that's really funky

This could be fixed by making the crystals not attach to blocks outside the chunk that it is in. I am assuming the issue is caused by the crystals attaching to the block in the next chunk over before that block gets removed by a feature or structure.