Boleite was very first found in Boleo, Mexico in 1891, inside a location with 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 very first discovery.
The initial specimens of boleite were found out by Eduoard Cumenge, a French mining engineer. A different unusual halide mineral in the same site, with an identical structure and a rather distinct chemical composition, was named cumengite in honor of Cumenge.
There are many options of boleite which make it of specific fascination to collectors. For one thing, it's got an abnormal chemical composition, being a hydrated direct copper silver chloride hydroxide. It consists of sizeable quantities of such metals, with about 49% lead, fourteen% copper and 9% silver. Secondly, it's got an interesting crystal composition, considering that boleite is always pseudocubically twinned. That is definitely, Each and every ΑσημÎνια Δαχτυλίδια dice-like crystal of boleite is really made up of three rectangular box-like crystals oriented at ideal angles to each other. Boleite also has an exceedingly eye-catching indigo color and many very exceptional transparent crystals are already Reduce as gemstones.
Boleite in MatrixBoleite in 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 to pearly luster. It truly is an unusually ΧÏυσά dense mineral, with a specific gravity of 5.05. Only some minerals, like hematite and cassiterite, have an increased density. Boleite's refractive index can also be incredibly higher at two.03-two.05; greater than ΧÏυσά sapphire, sphene and demantoid garnet.
Besides cumengite, there are a number of other minerals linked to boleite, including pseudoboleite, chloroxiphite, Δαχτυλίδια paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite Δαχτυλιδια bulgari 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.
