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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. The formation of obsidian will not affect the light level. | |
− | 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. | ||
[[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. | ||
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==Real life== | ==Real life== | ||
− | A common misconception | + | A common misconception, as it's typically found from volcanic areas, the dark color of obsidian does not indicate any inclusion of metals like iron. Obsidian is almost entirely quartz, just at a microcrystalline level. As there has yet to be any known threat by dragon or animated frost wights, the historical use of obsidian was mostly decorative until several peoples discovered its use as a sharp tool and eventually weaponized. Localized variants like "snowflake obsidian" and "chocolate" obsidian (with brown inclusions) are typically attributed to inclusionary quartz crystals and mafic minerals, respectively. |
− | The use of obsidian to create short swords in ''Dwarf Fortress'' is almost certainly inspired by the ''macuahuitl'', a sword-club used by the Aztecs and the other native peoples of Mesoamerica. The weapon was a short, strong wooden staff (normally one-handed, but two-handed versions existed), set with obsidian-flake blades that were literally more than razor-sharp. Flaked obsidian can have a monomolecular edge; today, it's used for extremely high-quality surgical scalpels, which have to be handled with extreme care | + | The use of obsidian to create short swords in ''Dwarf Fortress'' is almost certainly inspired by the ''macuahuitl'', a sword-club used by the Aztecs and the other native peoples of Mesoamerica. The weapon was a short, strong wooden staff (normally one-handed, but two-handed versions existed), set with obsidian-flake blades that were literally more than razor-sharp. Flaked obsidian can have a monomolecular edge; today, it's used for extremely high-quality surgical scalpels, which have to be handled with extreme care - a little pressure is enough for such a scalpel to cut deep; and if you cut yourself with one, you won't feel it until you start to bleed. |
Macuahuitls could penetrate flesh and leather with ease; Spanish conquistadors reported one case where a blow from a two-handed macuahuitl decapitated a horse. But the obsidian edges shattered when they struck metal armor, and macuahuitls didn't have a thrusting attack. The Spanish soon learned to put their armored soldiers forward, to fight in chokepoints – and to recruit the Aztecs' enemies, to field macuahuitl-wielders of their own (and let them do more of the dying in their place). | Macuahuitls could penetrate flesh and leather with ease; Spanish conquistadors reported one case where a blow from a two-handed macuahuitl decapitated a horse. But the obsidian edges shattered when they struck metal armor, and macuahuitls didn't have a thrusting attack. The Spanish soon learned to put their armored soldiers forward, to fight in chokepoints – and to recruit the Aztecs' enemies, to field macuahuitl-wielders of their own (and let them do more of the dying in their place). |