Boleite was first discovered in Boleo, Mexico in 1891, in a location with the Baja peninsula that is becoming popular for unusual minerals. Boleite is this sort of an uncommon and sophisticated mineral which the definition of its chemical composition and crystal construction have undergone several revisions since its to start with discovery.
The 1st specimens of boleite ended up identified by Eduoard Cumenge, a French mining engineer. Another scarce halide mineral with the identical location, with an analogous construction and a slightly distinctive chemical composition, was named cumengite in honor of Cumenge.
There are plenty of capabilities of boleite that make it of individual fascination to collectors. For one thing, it's got an uncommon chemical composition, being a hydrated direct 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 composition, since boleite is usually pseudocubically twinned. That's, each dice-like crystal of boleite is actually made up of three rectangular box-like crystals oriented at suitable ΧÏυσά angles to each other. Boleite also has an exceptionally desirable indigo coloration and several very exceptional transparent crystals are Reduce as gemstones.
Boleite in MatrixBoleite in Matrix
Like other halide minerals, which include fluorite, boleite is fairly soft, by Δαχτυλιδια skroutz using a Mohs hardness rating of only 3 to three.5. It's a vitreous to pearly luster. It is an ΑσημÎνια Δαχτυλίδια unusually dense mineral, with a certain gravity of five.05. Only a few minerals, for instance hematite and cassiterite, ΧÏυσά & ΛευκόχÏυσα Δαχτυλίδια have a greater density. Boleite's refractive index is likewise really superior at 2.03-two.05; higher than sapphire, sphene and demantoid garnet.
Together with cumengite, There are a selection of other minerals linked to boleite, together with pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
As well as the deposit in Δαχτυλιδια ΜοντεÏνα Baja, Mexico, boleite has long been found in Broken Hill in New South Wales, Australia; from the Mammoth District of Arizona in the United States; and while in the Mendip Hills of Somerset, England.
