idrialite

{{infobox mineral | name = Idrialite | category = Organic mineral | image = Idrialite-172289.jpg | caption = Idrialite, Skaggs Springs Mine, Sonoma County, California (size: 6.3 x 4.1 x 1.8 cm | formula = C22H14 | IMAsymbol = Id | molweight = | strunz = 10.BA.20 | dana = 50.03.08.01 | system = Orthorhombic Unknown space group | symmetry = | unit cell = a = 8.07, b = 6.42 c = 27.75 [Å]; Z = 4 | color = Greenish yellow, light brown, colorless | colour = | habit = | twinning = | cleavage = {001}, perfect; {100}, poor | fracture = Conchoidal | tenacity = | mohs = 1.5 | luster = Vitreous to adamantine | streak = | diaphaneity = | gravity = 1.236 | density = | polish = | opticalprop = Biaxial (+) | refractive = nα= 1.557 nβ = 1.734 nγ = 2.07 | birefringence = | pleochroism = X = pale yellow; Y = Z = yellow | 2V = 84° | dispersion = | extinction = | length fast/slow = | fluorescence = Short UV=blue, orange, yellow, green white | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = }} Idrialite is a rare hydrocarbon mineral with approximate chemical formula C22H14.

Idrialite usually occurs as soft orthorhombic crystals, is usually greenish yellow to light brown in color with bluish fluorescence. It is named after Idrija, town in Slovenia, where its occurrence was first described.