Platinum nuggets

From DwarfFortressWiki

Native platinum

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Uses
Ore of platinum Masonry Stone crafting Construction
Location
Soil (as small clusters) Olivine (as veins) Magnetite (as veins) Chromite (as small clusters)
Properties
Economic stone Material value 40
Wikipedia article

Ore for one of the most valuable metals available, equal in value to aluminum and second only to Adamantine. Its high material value makes it a convenient material for high value rooms for nobles. Especially so, since mining it still leaves a valuable platinum floor.

Platinum can occur in veins inside bodies of magnetite or olivine and as small cluster within chromite and alluvial soil.

It is possible to make Crafts or Mechanisms with Platinum nuggets if it's enabled in the z-status stone menu, resulting in quite valuable items, good for export early in the game.