Boleite was very first identified in Boleo, Mexico in 1891, inside a region of the Baja peninsula that happens to be renowned 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 quite a few revisions considering the fact that its initially discovery.
The primary specimens of boleite had been discovered by Eduoard Cumenge, a French mining engineer. A further exceptional halide mineral from your exact same location, with the same structure and a rather diverse chemical composition, was named cumengite in honor of Cumenge.
There are numerous attributes of boleite which make it of distinct interest to collectors. For something, it has an unconventional chemical composition, currently being a hydrated lead copper silver chloride hydroxide. It incorporates major quantities of such metals, with about 49% guide, fourteen% copper and 9% silver. Secondly, it's got an interesting crystal structure, due to the fact boleite is usually pseudocubically twinned. That is, Each and every dice-like crystal of boleite is really made up of 3 rectangular box-like crystals oriented at right angles to one another. Boleite also has a really interesting indigo shade and some quite rare clear crystals have been Slice as gemstones.
Boleite in MatrixBoleite in Matrix
Like other halide minerals, like fluorite, boleite is sort of delicate, which has a Mohs hardness rating of only three to 3.5. It's got a vitreous to pearly luster. It really is an unusually dense mineral, with a selected gravity of 5.05. Just a few Δαχτυλιδια Φθηνα minerals, such as hematite and cassiterite, have a better density. Boleite's refractive index is usually quite high at 2.03-two.05; greater than sapphire, sphene and demantoid garnet.
Besides cumengite, there are a number of Δαχτυλιδια swarovski other minerals linked to boleite, including pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
Together with the deposit Δαχτυλίδια Γυναικεία in Baja, Mexico, boleite has long been found in Broken Hill in New Δαχτυλιδια Γυναικεια South Wales, Australia; from the Mammoth ΛευκόχÏυσα District of Arizona in the United States; and while in the Mendip Hills of Somerset, England.
