Boleite was 1st identified in Boleo, Mexico in 1891, within a region of the Baja peninsula that has become famous for uncommon minerals. Boleite is this kind of an unusual and sophisticated mineral the definition of its chemical composition and crystal construction have undergone quite a few revisions due to the fact its 1st discovery.
The initial specimens of boleite had been found out by Eduoard Cumenge, a French mining engineer. A different unusual halide mineral in the same locale, with the same structure and a rather distinct chemical composition, was named cumengite in honor of Cumenge.
There are many features of boleite which make it of specific fascination to collectors. For one thing, it's got an abnormal chemical composition, being a hydrated guide copper silver chloride hydroxide. It includes significant portions of these metals, with about forty nine% lead, fourteen% copper and 9% silver. Next, it has a captivating crystal construction, since boleite is often pseudocubically twinned. That's, Each individual cube-like crystal of boleite is definitely composed of a few rectangular box-like crystals oriented at correct angles to one another. Boleite also has an Λευκόχρυσα extremely attractive indigo shade and some quite rare clear crystals have been Slice as gemstones.
Boleite in MatrixBoleite in Matrix
Like other halide minerals, like fluorite, boleite is kind of gentle, that has a Mohs hardness rating of only three to 3.five. It has a vitreous to pearly luster. It truly is an unusually dense mineral, with a specific gravity of 5.05. Only some minerals, like hematite and cassiterite, have Δαχτυλιδια Φθηνα an increased density. Boleite's refractive index can also be incredibly higher at two.03-two.05; greater than sapphire, sphene and demantoid garnet.
Besides cumengite, there are a number of other minerals linked to boleite, including Δαχτυλιδια Φθηνα pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
Together with the Ασημένια Δαχτυλίδια deposit in Baja, Mexico, boleite has long been found in Damaged Hill Δαχτυλίδια Γυναικεία in New South Wales, Australia; during the Mammoth District of Arizona in the United States; and from the Mendip Hills of Somerset, England.