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Difference between revisions of "40d:Stone"

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(Undo revision 41282034 by 3lB33 (Talk) Radical changes should probably be "discussed" first - renamed column instead)
(There!)
Line 83: Line 83:
 
! Found in
 
! Found in
 
! Found how
 
! Found how
! Primary/Exclusive<br /> source of
+
! Special<br /> source of
 
|-
 
|-
|{{Raw Tile|^|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Alabaster Alabaster]||Gypsum||Small clusters||??
+
|{{Raw Tile|^|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Alabaster Alabaster]||Gypsum||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|`|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Alunite Alunite]||All [[Igneous extrusive layer|Igneous extrusive]], Kaolinite||Large clusters||??
+
|{{Raw Tile|`|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Alunite Alunite]||All [[Igneous extrusive layer|Igneous extrusive]], Kaolinite||Large clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|v|#fff|#ccc}}  {{Raw Tile|●|#ccc|#000}}||[http://en.wikipedia.org/wiki/Anhydrite Anhydrite]||Gypsum, Satinspar, Alabaster, Selenite||Single||??
+
|{{Raw Tile|v|#fff|#ccc}}  {{Raw Tile|●|#ccc|#000}}||[http://en.wikipedia.org/wiki/Anhydrite Anhydrite]||Gypsum, Satinspar, Alabaster, Selenite||Single||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|+|#800|#ccc}}  {{Raw Tile|●|#800|#000}}||[[Bauxite]]||All [[Sedimentary layer|Sedimentary]]||Large clusters||[[Gem#Precious|(star) rubies]], [[Gem#Precious|(star) sapphires]]
+
|{{Raw Tile|+|#800|#ccc}}  {{Raw Tile|●|#800|#000}}||[[Bauxite]]||All [[Sedimentary layer|Sedimentary]]||Large clusters||[[Gem#Precious|(star) rubies]], [[Gem#Precious|(star) sapphires]], [[Gem|Variscite]]
 
|-
 
|-
 
|{{Raw Tile|☼|#888|#CCC}}  {{Raw Tile|☼|#888|#000}}||[[Bituminous coal]]||All [[Sedimentary layer|Sedimentary]]||Veins||[[Fuel]]
 
|{{Raw Tile|☼|#888|#CCC}}  {{Raw Tile|☼|#888|#000}}||[[Bituminous coal]]||All [[Sedimentary layer|Sedimentary]]||Veins||[[Fuel]]
 
|-
 
|-
|{{Raw Tile|`|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Borax Borax]||Gypsum, Rock salt||Small clusters||??
+
|{{Raw Tile|`|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Borax Borax]||Gypsum, Rock salt||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|%|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Brimstone Brimstone]||All [[Igneous extrusive layer|Igneous extrusive]], Gypsum||Small clusters||??
+
|{{Raw Tile|%|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Brimstone Brimstone]||All [[Igneous extrusive layer|Igneous extrusive]], Gypsum||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|"|#FFF|#CCC}}  {{Raw Tile|●|#FFF|#000}}||[[Calcite]]||Limestone, Marble||Small clusters||??
+
|{{Raw Tile|"|#FFF|#CCC}}  {{Raw Tile|●|#FFF|#000}}||[[Calcite]]||Limestone, Marble||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|&#61;|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Chromite Chromite]||Olivine||Veins||[[Native platinum]]+[[demantoid]]  
+
|{{Raw Tile|&#61;|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Chromite Chromite]||Olivine||Veins||[[Native platinum]],[[demantoid]]  
 
|-
 
|-
|{{Raw Tile|£|#f00|#ccc}}  {{Raw Tile|&#42;|#F00|#000}}||[http://en.wikipedia.org/wiki/Cinnabar Cinnabar]||All [[Igneous extrusive layer|Igneous extrusive]], Shale, Quartzite||Veins||??
+
|{{Raw Tile|£|#f00|#ccc}}  {{Raw Tile|&#42;|#F00|#000}}||[http://en.wikipedia.org/wiki/Cinnabar Cinnabar]||All [[Igneous extrusive layer|Igneous extrusive]], Shale, Quartzite||Veins||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|£|#00f|#ccc}}  {{Raw Tile|&#42;|#00F|#000}}||[http://en.wikipedia.org/wiki/Cobaltite Cobaltite]||All Igneous All [[Metamorphic layer|Metamorphic]]||Veins||??
+
|{{Raw Tile|£|#00f|#ccc}}  {{Raw Tile|&#42;|#00F|#000}}||[http://en.wikipedia.org/wiki/Cobaltite Cobaltite]||All Igneous All [[Metamorphic layer|Metamorphic]]||Veins||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|-|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Cryolite Cryolite]||Granite||Small clusters||??
+
|{{Raw Tile|-|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Cryolite Cryolite]||Granite||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|o|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[[Graphite]]||Gneiss, Quartzite, Marble, Schist||Small clusters||??
+
|{{Raw Tile|o|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[[Graphite]]||Gneiss, Quartzite, Marble, Schist||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|#|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Gypsum Gypsum]||All [[Sedimentary layer|Sedimentary]]||Large clusters||??
+
|{{Raw Tile|#|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Gypsum Gypsum]||All [[Sedimentary layer|Sedimentary]]||Large clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|"|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Hornblende Hornblende]||All Igneous, All [[:Category:Metamorphic Stone Layers|Metamorphic]]||Small clusters||??
+
|{{Raw Tile|"|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Hornblende Hornblende]||All Igneous, All [[:Category:Metamorphic Stone Layers|Metamorphic]]||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|.|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Ilmenite Ilmenite]||[[Gabbro]]||Small clusters||??
+
|{{Raw Tile|.|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Ilmenite Ilmenite]||[[Gabbro]]||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|░|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Jet_(lignite) Jet]||All [[Sedimentary layer|Sedimentary]]||Large clusters||??
+
|{{Raw Tile|░|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Jet_(lignite) Jet]||All [[Sedimentary layer|Sedimentary]]||Large clusters||Ordinary stuff
 
|-
 
|-
 
|{{Raw Tile|&#61;|#800|#ccc}}  {{Raw Tile|●|#800|#000}}||[http://en.wikipedia.org/wiki/Kaolinite Kaolinite]||All [[:Category:Sedimentary Stone Layers|Sedimentary]]||Large clusters||[[gems|turquoise]]
 
|{{Raw Tile|&#61;|#800|#ccc}}  {{Raw Tile|●|#800|#000}}||[http://en.wikipedia.org/wiki/Kaolinite Kaolinite]||All [[:Category:Sedimentary Stone Layers|Sedimentary]]||Large clusters||[[gems|turquoise]]
 
|-
 
|-
|{{Raw Tile|%|#008|#ccc}}  {{Raw Tile|●|#008|#000}}||[[Kimberlite]]||[[Gabbro]]||Veins||[[gems|diamonds]]
+
|{{Raw Tile|%|#008|#ccc}}  {{Raw Tile|●|#008|#000}}||[[Kimberlite]]||[[Gabbro]]||Veins||[[gems|diamonds]],[[Gems|Black pyrope]],[[Gems|Red Pyrope]],[[Gems|Rhodolite]]
 
|-
 
|-
 
|{{Raw Tile|*|#888|#CCC}}  {{Raw Tile|●|#888|#000}}||[[Lignite]]||All [[Sedimentary layer|Sedimentary]]||Veins||[[Fuel]]
 
|{{Raw Tile|*|#888|#CCC}}  {{Raw Tile|●|#888|#000}}||[[Lignite]]||All [[Sedimentary layer|Sedimentary]]||Veins||[[Fuel]]
 
|-
 
|-
|{{Raw Tile|%|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Marcasite Marcasite]||Kaolinite||Small clusters||??
+
|{{Raw Tile|%|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Marcasite Marcasite]||Kaolinite||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|v|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Mica Mica]||All [[Metamorphic layer|Metamorphic]], Granite||Large clusters||??
+
|{{Raw Tile|v|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Mica Mica]||All [[Metamorphic layer|Metamorphic]], Granite||Large clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|%|#0ff|#ccc}}  {{Raw Tile|●|#0FF|#000}}||[http://en.wikipedia.org/wiki/Microcline Microcline]||All Stone||Large clusters||none
+
|{{Raw Tile|%|#0ff|#ccc}}  {{Raw Tile|●|#0FF|#000}}||[http://en.wikipedia.org/wiki/Microcline Microcline]||All Stone||Large clusters||Ordinary stuff
 
|-
 
|-
 
|{{Raw Tile|%|#080|#ccc}}  {{Raw Tile|●|#080|#000}}||[http://en.wikipedia.org/wiki/Olivine Olivine]||[[Gabbro]]||Large clusters||[[Native platinum]]
 
|{{Raw Tile|%|#080|#ccc}}  {{Raw Tile|●|#080|#000}}||[http://en.wikipedia.org/wiki/Olivine Olivine]||[[Gabbro]]||Large clusters||[[Native platinum]]
 
|-
 
|-
|{{Raw Tile|-|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Orpiment Orpiment]||All [[Igneous extrusive layer|Igneous extrusive]]||Small clusters||??
+
|{{Raw Tile|-|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Orpiment Orpiment]||All [[Igneous extrusive layer|Igneous extrusive]]||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|%|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Orthoclase Orthoclase]||All [[Igneous intrusive layer|Igneous intrusive]], All [[:Category:Metamorphic Stone Layers|Metamorphic]]||Large clusters||none
+
|{{Raw Tile|%|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Orthoclase Orthoclase]||All [[Igneous intrusive layer|Igneous intrusive]], All [[:Category:Metamorphic Stone Layers|Metamorphic]]||Large clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|,|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Periclase Periclase]||Marble||Small clusters||??
+
|{{Raw Tile|,|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Periclase Periclase]||Marble||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|%|#f00|#ccc}}  {{Raw Tile|●|#F00|#000}}||[http://en.wikipedia.org/wiki/Petrified_wood Petrified wood]||All [[Sedimentary layer|Sedimentary]]||Small clusters||??
+
|{{Raw Tile|%|#f00|#ccc}}  {{Raw Tile|●|#F00|#000}}||[http://en.wikipedia.org/wiki/Petrified_wood Petrified wood]||All [[Sedimentary layer|Sedimentary]]||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|*|#808|#ccc}}  {{Raw Tile|●|#808|#000}}||[http://en.wikipedia.org/wiki/Pitchblende Pitchblende]||Granite||Small clusters||??
+
|{{Raw Tile|*|#808|#ccc}}  {{Raw Tile|●|#808|#000}}||[http://en.wikipedia.org/wiki/Pitchblende Pitchblende]||Granite||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|Θ|#880|#ccc}}  {{Raw Tile|●|#880|#000}}||[http://en.wikipedia.org/wiki/Puddingstone_(rock) Puddingstone]||Conglomerate||Large clusters||??
+
|{{Raw Tile|Θ|#880|#ccc}}  {{Raw Tile|●|#880|#000}}||[http://en.wikipedia.org/wiki/Puddingstone_(rock) Puddingstone]||Conglomerate||Large clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|%|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Pyrolusite Pyrolusite]||All Igneous ||Small clusters||??
+
|{{Raw Tile|%|#888|#ccc}}  {{Raw Tile|●|#888|#000}}||[http://en.wikipedia.org/wiki/Pyrolusite Pyrolusite]||All Igneous ||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|%|#f00|#ccc}}  {{Raw Tile|●|#F00|#000}}||[http://en.wikipedia.org/wiki/Realgar Realgar]||All [[Igneous extrusive layer|Igneous extrusive]]||Small clusters||??
+
|{{Raw Tile|%|#f00|#ccc}}  {{Raw Tile|●|#F00|#000}}||[http://en.wikipedia.org/wiki/Realgar Realgar]||All [[Igneous extrusive layer|Igneous extrusive]]||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|`|#808|#ccc}}  {{Raw Tile|●|#808|#000}}||[http://en.wikipedia.org/wiki/Rutile Rutile]||All [[Metamorphic layer|Metamorphic]], Granite||Small clusters||??
+
|{{Raw Tile|`|#808|#ccc}}  {{Raw Tile|●|#808|#000}}||[http://en.wikipedia.org/wiki/Rutile Rutile]||All [[Metamorphic layer|Metamorphic]], Granite||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|x|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Saltpeter Saltpeter]||All [[Sedimentary layer|Sedimentary]]||Small clusters||??
+
|{{Raw Tile|x|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Saltpeter Saltpeter]||All [[Sedimentary layer|Sedimentary]]||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|-|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Satinspar Satinspar]||Gypsum||Small clusters||??
+
|{{Raw Tile|-|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Satinspar Satinspar]||Gypsum||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|;|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Selenite Selenite]||Gypsum||Small clusters||??
+
|{{Raw Tile|;|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Selenite Selenite]||Gypsum||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|≈|#080|#ccc}}  {{Raw Tile|●|#080|#000}}||[http://en.wikipedia.org/wiki/Serpentine Serpentine]||Olivine||Small clusters||??
+
|{{Raw Tile|≈|#080|#ccc}}  {{Raw Tile|●|#080|#000}}||[http://en.wikipedia.org/wiki/Serpentine Serpentine]||Olivine||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|%|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Stibnite Stibnite]||All [[Igneous extrusive layer|Igneous extrusive]]||Small clusters||??
+
|{{Raw Tile|%|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Stibnite Stibnite]||All [[Igneous extrusive layer|Igneous extrusive]]||Small clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|&#61;|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Sylvite Sylvite]||Rock salt||Large clusters||??
+
|{{Raw Tile|&#61;|#ff0|#ccc}}  {{Raw Tile|●|#FF0|#000}}||[http://en.wikipedia.org/wiki/Sylvite Sylvite]||Rock salt||Large clusters||Ordinary stuff
 
|-
 
|-
|{{Raw Tile|&#124;|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Talc Talc]||Dolomite||Large clusters||??
+
|{{Raw Tile|&#124;|#fff|#ccc}}  {{Raw Tile|●|#FFF|#000}}||[http://en.wikipedia.org/wiki/Talc Talc]||Dolomite||Large clusters||Ordinary stuff
 
|}
 
|}
  

Revision as of 19:31, 10 August 2009

(For the beginning player, see also The Non-Dwarf's Guide to Rock)



Stone or rock is a naturally occuring solid aggregate of minerals. It sometimes leaves behind material after being mined or collapsing. Other types of minable tiles include soil and sand.

Stone is divided into a few key categories:

Economic stones are types of stone that can be reserved for a special purpose. For ores, this is smelting and for fluxes, this is steel production. Bituminous coal and lignite can be reserved for making coke.

Having created loose stone, many times you'll want to get rid of it or at least move it someplace else. See stone management for advice.

This article is about DF geology and the distribution of stones, and does not contain the specific locations of metal ores or gems.

Main layer types

Main article: Layer

There are four types of stone layers (plus soil, which is not stone). The type of layer is the primary indicator of what kind of ores you are likely to find on the map, as well as a sign of volcanic activity.

The types are sedimentary layers, igneous intrusive layers, igneous extrusive layers, and metamorphic layers.

The primary types of rock only occur in their own layers. (e.g. you won't find limestone in a marble layer.)

Stones forming entire layers

These types of stone occur as entire layers, containing some veins and pockets of other minerals (see below). If one of the following types of stone is present on your map, it will be listed in one of the biomes on the embark screen.

Sedimentary Igneous intrusive Igneous extrusive Metamorphic


Other Stone

Stones found on this table will occur as pockets and veins inside their respective stone layers (see above). When your miners newly encounter one of them, the game will pause and you will receive an announcement; even for the ones that have no use other than to build constructions of unusual colors. Note that the veins or clusters can spread into other layers, and may cause some layers to contain stones they usually wouldn't. A few of these stones, such as Olivine, have other, more interesting minerals appear inside them.

Non-layer stone formations occur in one of three shapes: large clusters, veins, and small clusters. (See Veins & Clusters for full info.)

The following table does not contain ores and gems. The types of stone listed here that do not link to their own article are generic.v0.28.181.40d

Icons Name Found in Found how Special
source of
^ Alabaster Gypsum Small clusters Ordinary stuff
` Alunite All Igneous extrusive, Kaolinite Large clusters Ordinary stuff
v Anhydrite Gypsum, Satinspar, Alabaster, Selenite Single Ordinary stuff
+ Bauxite All Sedimentary Large clusters (star) rubies, (star) sapphires, Variscite
Bituminous coal All Sedimentary Veins Fuel
` Borax Gypsum, Rock salt Small clusters Ordinary stuff
% Brimstone All Igneous extrusive, Gypsum Small clusters Ordinary stuff
" Calcite Limestone, Marble Small clusters Ordinary stuff
= Chromite Olivine Veins Native platinum,demantoid
£ * Cinnabar All Igneous extrusive, Shale, Quartzite Veins Ordinary stuff
£ * Cobaltite All Igneous All Metamorphic Veins Ordinary stuff
- Cryolite Granite Small clusters Ordinary stuff
o Graphite Gneiss, Quartzite, Marble, Schist Small clusters Ordinary stuff
# Gypsum All Sedimentary Large clusters Ordinary stuff
" Hornblende All Igneous, All Metamorphic Small clusters Ordinary stuff
. Ilmenite Gabbro Small clusters Ordinary stuff
Jet All Sedimentary Large clusters Ordinary stuff
= Kaolinite All Sedimentary Large clusters turquoise
% Kimberlite Gabbro Veins diamonds,Black pyrope,Red Pyrope,Rhodolite
* Lignite All Sedimentary Veins Fuel
% Marcasite Kaolinite Small clusters Ordinary stuff
v Mica All Metamorphic, Granite Large clusters Ordinary stuff
% Microcline All Stone Large clusters Ordinary stuff
% Olivine Gabbro Large clusters Native platinum
- Orpiment All Igneous extrusive Small clusters Ordinary stuff
% Orthoclase All Igneous intrusive, All Metamorphic Large clusters Ordinary stuff
, Periclase Marble Small clusters Ordinary stuff
% Petrified wood All Sedimentary Small clusters Ordinary stuff
* Pitchblende Granite Small clusters Ordinary stuff
Θ Puddingstone Conglomerate Large clusters Ordinary stuff
% Pyrolusite All Igneous Small clusters Ordinary stuff
% Realgar All Igneous extrusive Small clusters Ordinary stuff
` Rutile All Metamorphic, Granite Small clusters Ordinary stuff
x Saltpeter All Sedimentary Small clusters Ordinary stuff
- Satinspar Gypsum Small clusters Ordinary stuff
; Selenite Gypsum Small clusters Ordinary stuff
Serpentine Olivine Small clusters Ordinary stuff
% Stibnite All Igneous extrusive Small clusters Ordinary stuff
= Sylvite Rock salt Large clusters Ordinary stuff
| Talc Dolomite Large clusters Ordinary stuff

DF Geology and real-world Geology

The geology and stones of Dwarf Fortress are based on real-world geology and mineralogy. To understand the terms used here, you may want to crack open a geology textbook (a high school one should suffice). If you don't happen to have one close by, the Wikipedia articles for geology, mineralogy, or the terms in question might help.