Hardness

Hardness determines how hard it is to dig out a tile and how much the tile can withstand pressure primarily from Liquids.

Especially Tiles out of Sandstone are unsuitable to hold large amounts of water.

Very Firm materials like Granite require skilled dupes to be mined. Nearly Impenetrable materials like Abyssalite need even further training.

Hardness Description	Range	Required Skill	Example
Very Soft	<10	None	Algae, Dirt, Sedimentary Rock
Soft	10-24	None	Sand, Sandstone
Firm	25-49	None	Copper Ore, Ice, Igneous Rock
Very Firm	50-149	Hard Digging	Bleach Stone, Granite
Nearly Impenetrable	150-199	Superhard Digging	Abyssalite, Wolframite
Super Duper Hard	200-250	Super-Duperhard Digging	Diamond, Obsidian
Radioactive Materials	251-254	Hazmat Digging	Corium
Impenetrable	≥255	Unobtainable	Neutronium