Minecraft 23w43a
A new 1.21 snapshot adds tick warping! See the changelog.
Tick Command
For details, see gnembon’s writeup: How to use vanilla /tick if you used carpet /tick before
Copper Blocks
All copper blocks have 3 hardness and 6 blast resistance, except doors and trapdoors which have 3 blast resistance.
Copper grates cannot be waterlogged.
Copper Bulb
Copper bulbs have a 1 game tick delay between when they are updated and when they switch on/off.
Tuff Blocks
All tuff blocks have 1.5 hardness and 6 blast resistance.