Boleite was to start with found out in Boleo, Mexico in 1891, inside of a location on the Baja peninsula that has grown to be popular for unusual minerals. Boleite is this sort of an uncommon and complex mineral which the definition of its chemical composition and crystal construction have undergone several revisions considering the fact that its to start with discovery.
The 1st specimens of boleite ended up found out by Eduoard Cumenge, a French mining engineer. A different exceptional halide mineral through the exact same location, with the same construction and a slightly unique chemical composition, was named cumengite in honor of Cumenge.
There are various characteristics of boleite that make it of particular fascination to collectors. For one thing, it's got an abnormal chemical composition, being a hydrated guide copper silver chloride hydroxide. It includes Δαχτυλιδια ΜονοπετÏα significant portions of these metals, with about forty nine% lead, fourteen% copper and 9% silver. Next, it's a captivating crystal structure, considering the fact that boleite is usually pseudocubically twinned. That's, Each individual cube-like crystal of boleite is definitely composed of a few rectangular box-like crystals oriented at proper angles to one another. Boleite also has an extremely attractive indigo shade and a few Δαχτυλιδια ΜοντεÏνα incredibly uncommon clear crystals have already been Slash as gemstones.
Boleite in MatrixBoleite in Matrix
Like other halide minerals, for example fluorite, Δαχτυλιδια ΜοντεÏνα boleite is quite delicate, which has a Mohs hardness score of only three Δαχτυλιδια ΜονοπετÏα to 3.five. It's got a vitreous ΧÏυσά to pearly luster. It really is an unusually dense mineral, with a 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 high at 2.03-two.05; greater than sapphire, sphene and demantoid garnet.
Besides cumengite, there are a number of other minerals linked to boleite, including pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
Together with the deposit in Baja, Mexico, boleite has been found in Broken Hill in New South Wales, Australia; during the Mammoth District of Arizona in The us; and from the Mendip Hills of Somerset, England.
