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− | '''Obsidian''' is one of the types of "[[stone]]" (technically volcanic | + | '''Obsidian''' is one of the types of "[[stone]]" (technically volcanic glass) that forms entire [[Stone#Stones forming entire layers|layer]]s. Obsidian is also found surrounding magma pools and volcanoes, exactly 1 tile thick, and has the distinction of being the only stone that can be [[obsidian farming|created during play]]. Obsidian is considered an [[Economic stones|economic stone]] by default; in order to allow general use at workshops and in architecture you must enable "obsidian" in the [[stocks]] "Stone" menu. |
"Obsidian" is also the twelfth month of the dwarven [[calendar]], covering late Winter. | "Obsidian" is also the twelfth month of the dwarven [[calendar]], covering late Winter. | ||
==Rock short sword== | ==Rock short sword== | ||
− | Obsidian can also be made into obsidian [[short sword]]s with one log at the craftsdwarf's workshop. If you embark on an obsidian [[mountain]] or manage to reach [[magma]] before finding metallic ores, these are good at first to defend your fort from early [[wolf]] and [[giant eagle]] attacks, but weak in comparison to any metal weaponry | + | Obsidian can also be made into obsidian [[short sword]]s with one log at the craftsdwarf's workshop. If you embark on an obsidian [[mountain]] or manage to reach [[magma]] before finding metallic ores, these are good at first to defend your fort from early [[wolf]] and [[giant eagle]] attacks, but weak in comparison to any metal weaponry being unable to defeat even basic copper armor, so keep that in mind once you start encountering metal armored invaders. Note that with as obsidian short swords use wood (presumably used in the handle), [[Elf|Elves]] will be offended if you trade obsidian swords and refuse the trade. |
Obsidian is the only rock that can be used to make stone-based weapons. | Obsidian is the only rock that can be used to make stone-based weapons. | ||
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Previous versions lacked defined yield and shear values and used the defaults from the stone template; this rendered them very blunt and unable to cut skin. Since 40.05 obsidian features more proper yield and shear values, making these weapons much more viable. Obsidian now has glass-like yield and shear values, which allow rock short swords to slice through skin, leather armor, and wood armor used by [[Elf|elves]]. | Previous versions lacked defined yield and shear values and used the defaults from the stone template; this rendered them very blunt and unable to cut skin. Since 40.05 obsidian features more proper yield and shear values, making these weapons much more viable. Obsidian now has glass-like yield and shear values, which allow rock short swords to slice through skin, leather armor, and wood armor used by [[Elf|elves]]. | ||
− | + | ==Obsidian formation== | |
− | + | Obsidian can be formed by mixing [[water]] and [[magma]]. Any tiles containing both [[water]] and [[magma]] will be replaced with unmined obsidian, generating abundant amounts of [[steam]]. When dumping water via a pond zone onto magma, the water has to fall free for at least one z-level (i.e. the pond zone must be two or more z-levels above the magma); otherwise only steam will be produced. | |
− | Obsidian can be formed by mixing [[water]] and [[magma]]. Any tiles containing both [[water]] and [[magma]] | ||
Most non-[[magma-safe]] objects that were in the [[magma]] prior to the formation of obsidian are completely destroyed, which can be an effective method of removing unwanted items or enemies, although long exposure times to magma are suggested to ensure destruction. All [[magma-safe]] items will be entombed in the tile, and can be regained by mining it along with any magma-unsafe items that happened to survive the casting process. No instances of globs of molten metal surviving obsidian formation have been noted, though apparently [[fire|burning]] objects can remain on fire when cast in obsidian. The survival rate of magma-unsafe items is believed to depend on the exposure time to magma being short enough to not cause the item in question to melt or burn before obsidian formation occurs—fragile items placed in [[water]] that is then exposed to magma tend to survive casting unscathed. Creatures cast in obsidian die, even without significant exposure to magma. Creatures in cages will survive the casting process, though they may still die from exposure to the extreme temperature of magma. | Most non-[[magma-safe]] objects that were in the [[magma]] prior to the formation of obsidian are completely destroyed, which can be an effective method of removing unwanted items or enemies, although long exposure times to magma are suggested to ensure destruction. All [[magma-safe]] items will be entombed in the tile, and can be regained by mining it along with any magma-unsafe items that happened to survive the casting process. No instances of globs of molten metal surviving obsidian formation have been noted, though apparently [[fire|burning]] objects can remain on fire when cast in obsidian. The survival rate of magma-unsafe items is believed to depend on the exposure time to magma being short enough to not cause the item in question to melt or burn before obsidian formation occurs—fragile items placed in [[water]] that is then exposed to magma tend to survive casting unscathed. Creatures cast in obsidian die, even without significant exposure to magma. Creatures in cages will survive the casting process, though they may still die from exposure to the extreme temperature of magma. | ||
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[[Obsidian farming]] can be used to produce large amounts of obsidian for masonry, crafting, or construction. | [[Obsidian farming]] can be used to produce large amounts of obsidian for masonry, crafting, or construction. | ||
− | + | ==Real Life== | |
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− | ==Real | ||
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− | + | The use of obsidian to create short swords in Dwarf Fortress is almost certainly inspired by the ''macuahuitl'', a weapon used by the ancient and medieval indigenous peoples of Mesoamerica, of which the Aztecs are the most well-known. The weapon itself is more club- than sword-like in construction, being a long wooden handle with extremely sharp prismatic blades of obsidian embedded in its sides, usually intended to be wielded with one hand, though larger two-handed variations were known. While very sharp and effective against flesh and leather, it was defeated by metal armor. | |
<gallery> | <gallery> | ||
− | + | Image:Obsidian.jpg|Obsidian | |
File:ObsidianDomeCA.JPG|Obsidian rock face | File:ObsidianDomeCA.JPG|Obsidian rock face | ||
File:Teotihuacán - Obsidianklinge.jpg|Obsidian blade | File:Teotihuacán - Obsidianklinge.jpg|Obsidian blade | ||
File:Snowflake_obsidian.jpg|Snowflake obsidian & an obsidian arrowhead | File:Snowflake_obsidian.jpg|Snowflake obsidian & an obsidian arrowhead | ||
</gallery> | </gallery> | ||
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{{gamedata}} | {{gamedata}} | ||
{{stones}} | {{stones}} | ||
{{Category|Economic Stone}} | {{Category|Economic Stone}} |