The chemical name for Rhodonite is manganese inosilicate. It comes from the family of the pyroxenoid group of minerals that crystallize in triclinic system. Rhodonite crystals are frequently found in thick tabular shape, but are uncommon. Its prismatic cleavage is perfect, nearing a right angle. In part, manganese is frequently substituted by Iron, Calcium, and Magnesium and at times with Zinc, which at times may have a substantial presence. One of its varieties, called Bustamite is known to have as large as twenty percent calcium oxide. Another zinciferous variety called Fowlerite contains seven percent zinc oxide.
Derivation of Name
It gets its name from the Greek “ῥόδος” Rhodos, or rosy.
Rhodonite is known to have been used as an ornate stone. In the manganese and iron mines of Pajsberg close to Filipstad and Långban at Värmland, Sweden, minute radiant and transparent crystals (Pajsbergite) and cleavage stacks are found.
Rhodonite frequently comes with black manganese oxide veins that run through its sample, imparting it an individual exterior of pink having black lines crisscrossing along with flower-like configuration all the way through. It is this variety that is most frequently utilized as gemstones, particularly in ornamental objects and beads. Large substantial pieces of Rhodonite with black streaks are frequently sliced and polished to make slabs for collectors.
Large deposits are found at: Ural Mountains, Broken Hill, Australia; Russia; Langban, Menas Gerais, Brazil, Sweden, and Franklin and Massachusetts in New Jersey, USA.
Rhodonite is a good-looking mineral. Because of its rose-pink color it is distinguished easily and could only be mistaken for Rhodochrosite or the extraordinary mineral Pyroxmangite, MnSiO3. However Rhodochrosite comes with streaks of white minerals like Calcite and also reacts with acids, whereas Rhodonite does not react with acids. Crystals of Pyroxmangite are regularly twinned, which is not so with crystals of Rhodochrosite.
Color is normally crimson to red or orange an, though also black at times.
Varies from 3.4 to 3.7
5.5 to 6.5