Building blocks
Purple Bulk Goods Base Full
A sandstone block with 200 hit points.
Harvest drops
Clay Soil× 30-40
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Drops when destroyed
Wood× 3
When it collapses
Falling, it leaves 
Destroyed Stone (50% of the time) where it lands.
Where to find (3 POIs)
Infested Warehouse (tier 4), Derelict Warehouse, EZ-Chem Depot.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.