It occurs with acanthite, calcite, chalcopyrite, galena, pyrite, quartz, rhodochrosite, rhodonite, sphalerite and native tellurium. Beloretsk quartz, jasper, agate, calcite, obsidian, aventurine, jasper, rhodonite, silver and gold-plated silver. It is often confused with the manganese silicate, rhodonite, but is distinctly softer. Cahnite is associated with these other minerals&colon; willemite, rhodonite, pyrochroite, hedyphane, datolite, and baryte. The inosilicate (chain silicate) structure of rhodonite has a repeat unit of five silica tetrahedra. It is the high-pressure, low-temperature dimorph of rhodonite. Mineral examples include plagioclase, microcline, rhodonite, turquoise, wollastonite and amblygonite, all in triclinic normal (). Rhodonite crystals often have a thick tabular habit, but are rare. Rhodonite has also been worked as an ornamental stone. Manganese and rhodonite were also mined in significant amounts in the Weabonga area. Rhodonite is the official gemstone of the Commonwealth of Massachusetts.