Boleite was to start with found out in Boleo, Mexico in 1891, inside of a location on the Baja peninsula that is becoming recognized for uncommon minerals. Boleite is such an unconventional and sophisticated mineral the definition of its chemical composition and crystal structure have been through various revisions due to the fact its 1st discovery.
The primary specimens of boleite had been discovered by Eduoard Cumenge, a French mining engineer. Another scarce halide mineral with the identical place, with an analogous framework and a slightly different chemical composition, was named cumengite in honor of Cumenge.
There are several options of boleite which make it of certain desire to collectors. For something, it has an unconventional chemical composition, getting a hydrated lead copper silver chloride hydroxide. It has considerable quantities of those metals, with about 49% guide, 14% copper and nine% silver. Secondly, it's a fascinating crystal composition, considering that boleite is always pseudocubically twinned. That is definitely, Just about every 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 incredibly appealing indigo coloration and a few pretty unusual clear crystals are already cut as gemstones.
Boleite in MatrixBoleite in Δαχτυλιδια ΜοντεÏνα Matrix
Like other halide minerals, for instance fluorite, boleite is very smooth, having a Mohs hardness score of only 3 to 3.five. It has a vitreous Δαχτυλίδια Γυναικεία to pearly luster. It can be an unusually dense mineral, with a specific gravity of five.05. Only some Δαχτυλιδια ΜοντεÏνα minerals, including hematite and cassiterite, have the next density. Boleite's refractive index is Δαχτυλιδια skroutz additionally pretty substantial at two.03-2.05; better than sapphire, sphene and demantoid garnet.
Along with cumengite, There are a variety of other minerals associated with boleite, like pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
In addition to the deposit in Baja, Mexico, boleite has become located in Broken Hill in New South Wales, Australia; while in the Mammoth District of Arizona ΛευκόχÏυσα in America; and within the Mendip Hills of Somerset, England.
