In order to craft one of every piece of Sunplate/Skyware furniture, you'll need 142 (157) Sunplate Blocks.
Creating large structures out of Sunplate Blocks may require farming Fallen Stars.
Sunplate Blocks, like water and cloud blocks, reduce the chance of Meteorite falling in their vicinity. A meteorite requires more than 600 "solid blocks" in a 900 block (30x30) area to spawn, and Sunplate/Cloud reduce the "solid block" count by 100, so 4 Sunplate/Cloud blocks will prevent meteorite impacts within 30 blocks.
Desktop version, 
Console version, 
Mobile version, 
Nintendo Switch version, and 
tModLoader version with a Sky Mill). When a square of four or more Sunplate Blocks are put next to each other, they make a pattern that resembles a starry night sky.
157) Sunplate Blocks.
