Potassium Nitrate

Harvest drops

• Nitrate Powder× 50
• Small Stone× 14
• Brass× 100-200 @ 5%
• Raw Diamond× 1 @ 0.5%
• Silver Nugget× 1 @ 1%
• Gold Nugget× 1 @ 0.7%

Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.

When it collapses

• Nitrate Powder× 50 @ 40%

Where to find (6 POIs)

Correa Rockworx (tier 5), Hybrid Mining (tier 5), Aranea Caverns (tier 4), Corkscrew Caverns (tier 1), Nav Mt. Cave (tier 1), Tranquil Terraced Retreat.

Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.