Economic stone

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Economic stones have special uses as ore, fuel, flux, plaster, or other uses like making special items. In technical terms, an economic stone is any stone which can be used as a reagent in any form of reaction. Obsidian is an exception, having been made an economic stone even though it is not used in any reaction - its specialty is that it is sharp enough to be used to craft swords.

You can use the z : Stone menu to restrict or un-restrict their use in the production of items and buildings. If you want to use an economic stone for something other than its listed uses, the stone must be green in that menu. This is critical when making a native aluminum statue, or preventing your masons from making furniture out of all your flux stone.

The z-Status: Stone menu will also show what each stone can be used for -- useful when you are wondering what to do with a pile of tetrahedrite.

This is a list of non-ore stones only; see ore, or the article on that specific material, for more information.

Icon	Name	Found in	Usage
▓	Limestone	Sedimentary (E)	Flux
`	Dolomite	Sedimentary (E)	Flux
░	Chalk	Sedimentary (E)	Flux
▓	Marble	Metamorphic (E)	Flux
"	Calcite	Limestone (S), Marble (S)	Flux
☼	Bituminous coal	Sedimentary (V)	Fuel
*	Lignite	Sedimentary (V)	Fuel
#	Gypsum	Sedimentary (L)	Plaster
^	Alabaster	Gypsum (S)	Plaster
;	Selenite	Gypsum (S)	Plaster
-	Satinspar	Gypsum (S)	Plaster
=	Kaolinite	Sedimentary (L)	Porcelain
▒	Obsidian	Igneous extrusive (E)	Sharp blades

(E) - forms entire layers

(L) - occurs in large clusters

(V) - occurs in veins

(S) - occurs in small clusters

V · T · E Stones
Sedimentary	Calcite · Chalk · Chert · Claystone · Conglomerate · Dolomite · Limestone · Mudstone · Rock salt · Sandstone · Shale · Siltstone
Igneous	Intrusive Diorite · Gabbro · Granite Extrusive Andesite · Basalt · Dacite · Obsidian · Rhyolite
Metamorphic	Gneiss · Marble  · Phyllite · Quartzite · Schist · Slate
Ore	Adamantine, raw · Aluminum, native · Bismuthinite · Cassiterite · Copper, native · Galena · Garnierite · Gold, native · Hematite · Horn silver · Limonite · Magnetite · Malachite · Platinum, native · Silver, native · Sphalerite · Tetrahedrite
Economic	Alabaster · Bituminous coal · Calcite · Gypsum · Kaolinite · Lignite · Satinspar · Selenite
Other	Alunite · Anhydrite · Bauxite · Borax · Brimstone · Chromite · Cinnabar · Cobaltite · Cryolite · Graphite · Hornblende · Ilmenite · Jet · Kimberlite · Marcasite · Mica · Microcline · Olivine · Orpiment · Orthoclase · Periclase · Petrified wood · Pitchblende · Puddingstone · Pyrolusite · Realgar · Rutile · Saltpeter · Serpentine · Slade · Stibnite · Sylvite · Talc