Building blocks
Red Bulk Goods Cap Small
A sandstone block with 100 hit points.
Harvest drops
Clay Soil× 6-12
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
When it collapses
Falling, it leaves 
Destroyed Stone (50% of the time) where it lands.
Where to find (4 POIs)
Happy Sleep Motel (tier 3), Pass-N-Gas Refinery (tier 3), Pawsnout Factory (tier 3), Uncle Ray's Supermarket (tier 3).
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.