Brucite
Its density is 2.4 (1 for water) and its hardness reaches 2.5/10. The line on the porcelain is white.
Brucite generally occurs as elongated, tabular crystals, aggregates, or hummocky masses. The crystals are white, green, blue-green, or yellow, and yellow-orange in the presence of manganese. Brucite is sometimes associated with aragonite, calcite, or talc. It is a source of magnesium. It was discovered by the American mineralogist A. Bruce.











