Pineapple opal

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Pineapple 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 beige
Wikipedia article

v50.14 · 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

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

In Real Life

Opal "pineapples" are highly unusual opal pseudomorphs. They are formed after a large glauberite crystal dissolves into nothing and leaves behind a crystal-shaped hole. When this "cast" is filled by slowly-depositing calcite which then opalizes, the result is a roughly egg-shaped spike ball of precious opal. They're only found in Australia's White Cliffs, which has yielded specimens as large as an adult fist. They can be (and previously were) cut into standard cabochon shapes, but their uniqueness has since been recognized and prized.

And as you guessed, they don't taste like pineapples.

Pineapple opal.

Raws
It's red jasper with opal in it, so a mix of red & white with opalescense. [INORGANIC:PINEAPPLE OPAL] [USE_MATERIAL_TEMPLATE:STONE_TEMPLATE] [MATERIAL_VALUE:10][DISPLAY_COLOR:7:7:1][TILE:15][IS_GEM:pineapple opal:STP:OVERWRITE_SOLID] [ENVIRONMENT:ALL_STONE:CLUSTER_SMALL:10] [SOLID_DENSITY:2115] Common to opals. Range is 1980 - 2250 [STATE_COLOR:ALL_SOLID:BEIGE]

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Semi-Precious (20☼-30☼)	Amethyst • Green jade • Kunzite • Light yellow diamond • Peridot • Tanzanite • Topaz Beryls Aquamarine • Golden beryl • Goshenite • Heliodor • Honey yellow beryl • Morganite • Red beryl • Topazolite Chrysoberyls Alexandrite • Cat's eye • Chrysoberyl Garnets Almandine • Black pyrope • Blue garnet • Clear garnet • Demantoid • Melanite • Pink garnet • Red pyrope • Rhodolite • Violet spessartine • Yellow spessartine Grossulars Cinnamon grossular • Red grossular • Tsavorite • Yellow grossular Opals Bandfire opal • Black opal • Claro opal • Crystal opal • Fire opal • Harlequin opal • Jelly opal • Levin opal • Pinfire opal • Precious fire opal • Red flash opal • White opal Zircons Black zircon • Brown zircon • Clear zircon • Green zircon • Red zircon • Yellow zircon Tourmalines Green tourmaline • Pink tourmaline • Indigo tourmaline • Red tourmaline Spinels Purple spinel • Red spinel • Rubicelle
Precious (40☼)	Emerald • Faint yellow diamond • Ruby • Sapphire
Rare (60☼)	Black diamond • Blue diamond • Clear diamond • Green diamond • Red diamond • Star ruby • Star sapphire • Yellow diamond
See also: Diamond • Opal • Glass • Pearl • Stone