Bobjonesite
Bobjonesite is an IMA-recognized mineral species in the vanadate class, with the chemical formula V⁴⁺O(SO₄)·3H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1/n).
Key properties: Mohs hardness 1; specific gravity 2.28; Pale blue (synthetic) streak; Vitreous luster; optically biaxial.
IMA symbol Bjon, IMA status: approved, named in 2000.
On fractures surfaces in a silicified log with coalified margins within mineralized conglomerate. Oxidation of pyrite and montroseite formed a suite of secondary minerals (Utah).
It is found associated with Ferricopiapite, kornelite, rozenite, szomolnokite, native sulfur, minasragrite, orthominasragrite (Utah); markhininite, shcherbinaite, pauflerite, karpovite.
The mineral was named to honor Robert (Bob) Jones (b. 1926) of Arizona, USA, senior editor of Rocks and Gems for contributions to the mineralogical community through his writing, lecturing.