Boleite was 1st found in Boleo, Mexico in 1891, in a location with the Baja peninsula that is becoming recognized for uncommon minerals. Boleite is such an unconventional and complicated mineral that the definition of its chemical composition and crystal construction have undergone numerous revisions given that its initial discovery.
The first specimens of boleite were being learned by Eduoard Cumenge, a French mining engineer. One more uncommon halide mineral within the similar area, with a similar composition and a rather various chemical composition, was named cumengite in honor of Cumenge.
There are several options of boleite that 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 usually pseudocubically twinned. That's, Each individual cube-like crystal of boleite is definitely composed ΧÏυσά of a few rectangular box-like crystals oriented at proper angles to one another. Boleite also has an incredibly appealing indigo shade and a few pretty uncommon clear crystals happen to be Slash as gemstones.
Boleite in MatrixBoleite in Δαχτυλιδια ΜονοπετÏα Matrix
Like other halide minerals, including fluorite, boleite is quite comfortable, which has a Mohs hardness score of only three Δαχτυλιδια Γυναικεια to 3.five. It's got a vitreous to pearly luster. It really is Δαχτυλιδια Φθηνα an unusually dense mineral, with a ΧÏυσά Δαχτυλίδια selected gravity of 5.05. Just a few minerals, such as hematite and cassiterite, have a better density. Boleite's refractive index is usually really superior at 2.03-two.05; higher than sapphire, sphene and demantoid garnet.
Together with cumengite, There are a selection of other minerals connected with boleite, which include pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
Along with the deposit in Baja, Mexico, boleite has actually been located in Broken Hill in New South Wales, Australia; while in the Mammoth District of Arizona in America; and inside the Mendip Hills of Somerset, England.
