Wood opal

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Wood opal

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Graphic
Uses
Gemcrafting Encrusting
Location
Found in stone layers as small clusters
Properties
Rough gem:
Material value 10☼ Fire-safe Not magma-safe Melting point 11500 °U (x) Boiling point 14000 °U (m) Ignition point none (m) Solid density 2115 kg/m³ Specific heat 800 J/kg·K Color dark brown
Wikipedia article

v50.15 · v0.47.05 This article is about the current version of DF. Note that some content may still need to be updated. More Info · V

Wood opals are moderately-valuable gems that can be found just about anywhere.

In real life

Wood opals are a variety of petrified wood whose structure happened to transition into opal instead of the more usual chalcedony. The amount of actual opal on the fossil can be as little as a thin shiny coating, but the in-game versions probably represent the much more valuable and uncommon solid opal specimens.

Wood opal.

Raws
[INORGANIC:WOOD OPAL] [USE_MATERIAL_TEMPLATE:STONE_TEMPLATE] [MATERIAL_VALUE:10][DISPLAY_COLOR:6:7:0][TILE:15][IS_GEM:wood opal:STP:OVERWRITE_SOLID] [ENVIRONMENT:ALL_STONE:CLUSTER_SMALL:10] [SOLID_DENSITY:2115] Common to opals. Range is 1980 - 2250 [STATE_COLOR:ALL_SOLID:DARK_BROWN]

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See also: Gizzard stone • Glass • Pearl • Stone