RHODONITE SPHALERITE Specimen Crystallized Pink Crystal Cluster Mineral PERU

Description: This specimen weighs 2.28 grams. It measures 25 mm x 13 mm x 5 mm. I offer a shipping discount for customers who combine their payments for multiple purchases into one payment! The discount is regular shipping price for the first item and just 50 cents for each additional item! To be sure you get your shipping discount just make sure all the items you want to purchase are in your cart. Auctions you win are added to your cart automatically. For any "buy it now" items or second chance offers, be sure to click the "add to cart" button, NOT the "buy it now" button. Once all of your items are in your cart just pay for them from your cart and the combined shipping discount should be applied automatically. I offer a money back guarantee on every item I sell. If you are not 100% happy with your purchase just send me a message to let me know and I will buy back the item for your full purchase price. Hi there. I am selling this rhodonite with sphalerite mineral specimen from Uchucchacua Mine in Huanuco, Peru. This is one of the nicest little pieces I have ever seen from there. It's so cute! This piece is very lustrous and a real gem. Have fun bidding, thanks so much for visiting my auction and have a great day! The following is information about this mineral from wikipedia: RhodoniteFrom Wikipedia, the free encyclopediaRhodoniteRhodonite, cumingtonite.JPGGeneralCategory InosilicateFormula(repeating unit)(Mn2+,Fe2+,Mg,Ca)SiO3Strunz classification9.DK.05Dana classification65.04.01.01Crystal systemTriclinicCrystal classPinacoidal (1)(same H-M symbol)Space groupP1Unit cella = 9.758 Å, b = 10.499 Åc = 12.205 Å; α = 108.58°β = 102.92°, γ = 82.52°; Z = 20IdentificationColorRose-pink to brownish red, gray, or yellowCrystal habitTabular crystals, massive, granularTwinningLamellar, composition plane {010}CleavagePerfect on {110} and {110}, (110) ^ (110) = 92.5°; good on {001}Fracture Conchoidal to unevenMohs scale hardness5.5 - 6.5Luster Vitreous to pearlyStreak WhiteDiaphaneityTransparent to translucentSpecific gravity3.57 - 3.76Optical propertiesBiaxial (+)Refractive indexnα = 1.711 - 1.738 nβ = 1.714 - 1.741 nγ = 1.724 - 1.751Birefringence δ = 0.013Pleochroism Weak2V angleMeasured: 58° to 73°, Calculated: 58°Alters toExterior commonly black from manganese oxidesReferences[1][2][3]Rhodonite is a manganese inosilicate, (Mn, Fe, Mg, Ca)SiO3 and member of the pyroxenoid group of minerals, crystallizing in the triclinic system. It commonly occurs as cleavable to compact masses with a rose-red color (the name comes from the Greek ῥόδος rhodos, rosy), often tending to brown because of surface oxidation. Rhodonite crystals often have a thick tabular habit, but are rare. It has a perfect, prismatic cleavage, almost at right angles. The hardness is 5.5–6.5, and the specific gravity 3.4–3.7; luster is vitreous, being less frequently pearly on cleavage surfaces. The manganese is often partly replaced by iron, magnesium, calcium, and sometimes zinc which may sometimes be present in considerable amounts; a greyish-brown variety containing as much as 20% of calcium oxide is called bustamite; fowlerite is a zinciferous variety containing 7% of zinc oxide. Pink rhodonite contrasting with black manganese oxides is sometimes used as gemstone material as seen in this specimen from Humboldt County, Nevada.The inosilicate (chain silicate) structure of rhodonite has a repeat unit of five silica tetrahedra. The rare polymorph pyroxmangite, formed at different conditions of pressure and temperature, has the same chemical composition but a repeat unit of seven tetrahedra. Rhodonite has also been worked as an ornamental stone. In the iron and manganese mines at Pajsberg near Filipstad and Långban in Värmland, Sweden, small brilliant and translucent crystals (pajsbergite) and cleavage masses occur. Fowlerite occurs as large, rough crystals, somewhat resembling pink feldspar, with franklinite and zinc ores in granular limestone at Franklin Furnace in New Jersey. Rhodonite is the official gemstone of the Commonwealth of Massachusetts.[4]

Price: 14.99 USD

Location: Tucson, Arizona

End Time: 2024-11-24T10:31:45.000Z

Shipping Cost: 5.95 USD