Boleite was initial found out in Boleo, Mexico in 1891, inside of a location on the Baja peninsula that is becoming well-known for rare 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 uncovered by Eduoard Cumenge, a French mining engineer. Yet another rare halide mineral within the similar spot, with a similar composition and a slightly various chemical composition, was named cumengite in honor of Cumenge.
There are several options 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 sizeable quantities of these metals, with about 49% 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 ΛευκόχÏυσα crystal of boleite is in fact made up of 3 rectangular box-like crystals oriented at ideal angles to each other. Boleite also has a very ΧÏυσά eye-catching indigo color and many extremely exceptional transparent crystals are Reduce as gemstones.
Boleite ΧÏυσά & ΛευκόχÏυσα Δαχτυλίδια in MatrixBoleite in Matrix
Like other halide minerals, which include fluorite, boleite is very tender, using a Mohs hardness ranking of only 3 to three.five. It Δαχτυλιδια ΜοντεÏνα has a vitreous to pearly luster. It can be an unusually dense mineral, with a specific gravity of five.05. Only some minerals, including hematite and cassiterite, have the next 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 a number of other minerals linked to boleite, including ΧÏυσά pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
Together with the deposit in 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.
