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 the definition of its chemical composition and crystal structure have been through many revisions considering that its initial discovery.
The first specimens of boleite were being learned by Eduoard Cumenge, a French mining engineer. Yet another rare halide mineral within the similar spot, with a similar composition and a slightly distinctive chemical composition, was named cumengite in honor of Cumenge.
There are various characteristics of boleite that make it of individual fascination to collectors. For one thing, it's got an uncommon chemical composition, remaining a hydrated direct copper silver chloride hydroxide. It consists of 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 is always pseudocubically twinned. That may be, Every single cube-like crystal of boleite is in fact composed of 3 rectangular box-like crystals oriented at right angles to one ΛευκόχÏυσα another. Boleite also has an incredibly appealing indigo coloration and a few pretty unusual clear crystals have already been cut as gemstones.
Boleite in MatrixBoleite in Matrix
Like other halide minerals, for example fluorite, boleite is quite comfortable, with a Mohs hardness score 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 ΜονοπετÏα an increased density. Boleite's refractive index can also be incredibly higher at two.03-two.05; larger than sapphire, sphene and demantoid garnet.
In combination with cumengite, there are Δαχτυλιδια ΜονοπετÏα a number of other minerals connected to boleite, including pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
Together with the deposit in Baja, Mexico, ΧÏυσά boleite has been present in Damaged Hill in New South Wales, Australia; inside ΧÏυσά & ΛευκόχÏυσα Δαχτυλίδια the Mammoth District of Arizona in America; and within the Mendip Hills of Somerset, England.
