Boleite was first uncovered in Boleo, Mexico in 1891, in the area in the Baja peninsula that has become well known for scarce minerals. Boleite is these types of an strange and complicated mineral that the definition of its chemical composition and crystal framework have gone through a number of revisions because its first discovery.
The main specimens of boleite ended up found by Eduoard Cumenge, a French mining engineer. Another scarce halide mineral through the identical place, with an analogous framework and a slightly distinctive chemical composition, was named cumengite in honor of Cumenge.
There are plenty of characteristics of boleite that make it of individual curiosity to collectors. For one thing, it's an uncommon chemical composition, remaining a hydrated direct copper silver chloride hydroxide. It consists of sizeable quantities of such metals, with about 49% lead, fourteen% copper and nine% silver. Secondly, it's got an interesting crystal composition, considering that boleite is always pseudocubically twinned. That is definitely, Each and every dice-like crystal of boleite is really made up of three rectangular box-like crystals oriented at suitable angles to each other. Boleite also has an exceptionally desirable indigo coloration and several pretty unusual clear crystals are already 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, ΑσημÎνια Δαχτυλίδια have an increased density. Boleite's refractive index can also be incredibly high at 2.03-two.05; greater than sapphire, sphene and demantoid garnet.
Besides cumengite, there are a ΧÏυσά number of other minerals linked to boleite, together with pseudoboleite, chloroxiphite, paralaurionite, ΧÏυσά matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
As well as the deposit in Baja, ΧειÏοποίητα Δαχτυλίδια Mexico, boleite has long been found Δαχτυλιδια ΜοντεÏνα in Broken Hill in New South Wales, Australia; from the Mammoth District of Arizona in America; and inside the Mendip Hills of Somerset, England.
