RHODOCHROSITE Crystal Cluster Mineral Specimen SUNNYSIDE MINE COLORADO

Description: This specimen weighs 8.51 grams. It measures 30 mm x 21 mm x 16 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 stunning rhodochrosite with quartz mineral Specimen from Sunnyside Mine, Silverton, Colorado. This piece is very lustrous and a real gem. Thanks so much for visiting my store and have a great day! The following is information about this mineral from wikipedia:Rhodochrosite ArticleTalkReadEditView historyFrom Wikipedia, the free encyclopediaRhodochrositeRhodochrosite on Matrix - Peru.jpgGeneralCategoryCarbonate mineralsFormula(repeating unit)MnCO3IMA symbolRds[1]Strunz classification5.AB.05Crystal systemTrigonalCrystal classHexagonal scalenohedral (3m)H-M symbol: (3 2/m)Space groupR3cUnit cella = 4.777, c = 15.67 [Å]; Z = 6IdentificationFormula mass114.95 g/molColorPink, rose, rose-red, red, cherry-red, yellow, yellowish grey, grey, cinnamon-brown, white, may be banded; colourless to pale rose in transmitted light.Crystal habitRhombohedral and scalenohedral crystals; also commonly bladed, columnar, stalactitic, botryoidal, granular or massiveTwinningOn {1012} as contact and lamellarCleavageOn {1011} perfect; parting on {1012}FractureUneven, conchoidalTenacityBrittleMohs scale hardness3.5–4LustreVitreous to pearlyStreakWhiteDiaphaneityTransparent to translucentSpecific gravity3.7Optical propertiesUniaxial (-)Refractive indexnω = 1.814–1.816nε = 1.596–1.598Birefringenceδ = 0.218PleochroismweakUltraviolet fluorescenceNoneReferences[2][3][4]Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3. In its pure form (rare), it is typically a rose-red colour,[5] but it can also be shades of pink to pale brown. It streaks white,[6] and its Mohs hardness varies between 3.5 and 4.5. Its specific gravity is between 3.45 and 3.6.[7] It crystallizes in the trigonal system, and cleaves with rhombohedral carbonate cleavage in three directions. Crystal twinning often is present. It is often confused with the manganese silicate, rhodonite, but is distinctly softer.[8] Rhodochrosite is formed by the oxidation of manganese ore, and is found in South Africa, China, and the Americas.[6] It is officially listed as one of the National symbols of Argentina. Rhodochrosite forms a complete solid solution series with iron carbonate (siderite). Calcium (as well as magnesium and zinc, to a limited extent) frequently substitutes for manganese in the structure, leading to lighter shades of red and pink, depending on the degree of substitution. This is the reason for the pink color of rhodochrosite. Occurrence and discoveryRhodochrosite occurs as a hydrothermal vein mineral along with other manganese minerals in low temperature ore deposits as in the silver mines of Romania where it was first found. Banded rhodochrosite is mined in Capillitas, Argentina. It was first described in 1813 in reference to a sample from Cavnic, Maramureş, present-day Romania. The name is derived from the combination of Greek words ροδόν (rodon, meaning rose) and χρωσις (chrosis, meaning coloring).[2] UseRhodochrosite is mainly used as an ore of manganese, which is a key component of low-cost stainless steel formulations and certain aluminium alloys.[9] Quality banded specimens are often used for decorative stones and jewellery. Due to its softness and perfect cleavage it is rarely found faceted in jewellery.[10] Manganese carbonate is extremely destructive to the amalgamation process historically used in the concentration of silver ores, and were often discarded on the mine dump.

Price: 44.99 USD

Location: Tucson, Arizona

End Time: 2024-11-13T07:32:35.000Z

Shipping Cost: 5.95 USD