- Rhodonite is a manganese inosilicate, with the formula (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 (its name comes from Ancient Greek ῥόδον (rhódon) ‘rose’), often tending to brown due to surface oxidation. The rose-red hue is caused by the manganese cation (Mn2+).
- Epsilon Scorpii (stars.astro.illinois.edu)
EPSILON SCO (Epsilon Scorpii). Though bright, second magnitude (2.29), in most other constellations Epsilon Sco would have a prominent place and probably a proper name. Here, in one of the grandest patterns of the sky, Scorpius, it has neither.