When using the /clone or /structure command on amethyst crystals, the crystals break only if there is not a block below it in most cases. If it doesn't have a block below it, it won't break.
MCPE-131490
/Clone or /structure breaks amethyst crystals
Resolved
Fixed
3
(Unassigned)
560308
Confirmed
Multiple
Nintendo Switch 12.0.3
1.17.20.20 Beta, 1.17.0, 1.17.2 Hotfix, 1.17.40
1.18.10.20 Beta, 1.18.10
Retrieved
The issue with amethyst crystals floating is already being tracked at MCPE-126076, so I have removed that part from the report.