Boleite was to start with uncovered in Boleo, Mexico in 1891, in the area from the Baja peninsula that has become famous for scarce minerals. Boleite is these an abnormal and complex mineral that the definition of its chemical composition and crystal framework have undergone several revisions since its to start with discovery.
The 1st specimens of boleite have been found by Eduoard Cumenge, a French mining engineer. Another scarce halide mineral with the very same place, with an analogous framework and a slightly distinctive chemical composition, was named cumengite in honor of Cumenge.
There are plenty of capabilities of boleite that make it of particular fascination to collectors. For one thing, it's got an uncommon chemical composition, being a hydrated direct copper silver chloride hydroxide. It includes sizeable quantities of such metals, with about forty nine% lead, fourteen% copper and 9% silver. Secondly, it's got an interesting crystal structure, due to the fact boleite ΛευκόχÏυσα is always pseudocubically twinned. That may be, Every single cube-like crystal of boleite is in fact made up of 3 rectangular box-like crystals oriented at ideal angles to each other. Boleite also has an incredibly appealing indigo shade and a few pretty scarce transparent crystals have been Slice as gemstones.
Boleite in MatrixBoleite in Matrix
Like other halide minerals, like fluorite, boleite is sort of delicate, which has a Mohs hardness rating Δαχτυλιδια Γυναικεια of only three to 3.five. It's got a vitreous to pearly luster. It truly is an unusually dense mineral, with a specific gravity of five.05. Only some minerals, including hematite and cassiterite, Δαχτυλιδια ΜοντεÏνα have the next density. Boleite's refractive index is additionally pretty significant at 2.03-2.05; Δαχτυλιδια ΜονοπετÏα bigger than sapphire, sphene and demantoid garnet.
As well as cumengite, There are ΧÏυσά a selection of other minerals connected with boleite, together with pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
Along with the deposit in Baja, Mexico, boleite has actually been found in Broken Hill in New South Wales, Australia; from the Mammoth District of Arizona in the United States; and inside the Mendip Hills of Somerset, England.
