argutite

{{Infobox mineral | name = Argutite | category = Oxide mineral | boxwidth = | boxbgcolor = | image = | caption = | formula = GeO2 |IMAsymbol=Agt | molweight = 104.61 | strunz = 4.DB.05 | dana = 04.04.01.07 | system = Tetragonal Ditetragonal dipyramidal class | symmetry = Tetragonal H–M Symbol: (4/m 2/m 2/m) Space group: P42/mnm | unit cell = a = 4.3975, c = 2.8625 [Å]; Z = 2 | color = Grayish black, light gray in reflected light | habit = Subhedral crystals, as inclusions in sphalerite | twinning = Occasionally twinned on {101} | cleavage = | fracture = | tenacity = | mohs = 6-7 | luster = Vitreous - adamantine | refractive = 2.01 | opticalprop = Uniaxial (+) | birefringence = | pleochroism = | streak = | gravity = 6.28 calculated | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Transparent to opaque | other = | references = }}

Argutite (GeO2) is a rare germanium oxide mineral. It is a member of the rutile group.