Boleite was 1st found in Boleo, Mexico in 1891, inside a location with the Baja peninsula that is becoming recognized for uncommon minerals. Boleite is such an strange and complicated mineral that the definition of its chemical composition and crystal composition have gone through numerous revisions because its first discovery.
The main specimens of boleite have been identified by Eduoard Cumenge, a French mining engineer. Another scarce halide mineral with the identical location, with an analogous construction and a slightly unique chemical composition, was named cumengite in honor of Cumenge.
There are various 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 these metals, with about forty nine% lead, fourteen% copper and 9% silver. Next, it has a captivating crystal construction, since boleite is often pseudocubically twinned. Which is, Each individual cube-like Δαχτυλιδια swarovski crystal of boleite is actually composed of a few rectangular box-like crystals Δαχτυλιδια bulgari oriented at appropriate angles to one ΧÏυσά 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 Matrix
Like other halide minerals, for instance fluorite, boleite is very smooth, which has a Mohs hardness rating of only three to 3.five. 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 minerals, such as hematite and cassiterite, have an increased density. Boleite's Δαχτυλιδια skroutz refractive index is also quite high at two.03-two.05; greater than sapphire, sphene and demantoid garnet.
In combination with cumengite, there are a number of other minerals affiliated with boleite, together with pseudoboleite, chloroxiphite, paralaurionite, matlockite, chlorargyrite, bideauxite, atacamite, mendipite and diaboleite.
As well as 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 Δαχτυλιδια swarovski States; and inside the Mendip Hills of Somerset, England.
