A dodo laying an egg makes a distinctive musical plop sound. While dodo eggs set on the ground like other dropped items, they do not appear to move and cannot be picked up by passing them. They must be specifically tapped and harvested.
As noted above, hornblende is a name used for a number of dark-colored amphibole minerals that are compositional variants with similar physical properties. These minerals can not be distinguished from one another without laboratory analysis.he mineral hornblende has very few uses. Its primary use might be as a mineral specimen. However, hornblende is the most abundant mineral in a rock known as amphibolite which has a large number of uses. It is crushed and used for highway construction and as railroad ballast. It is cut for use as dimension stone.
Lodestones were used as an early form of magnetic compass. Magnetite typically carries the dominant magnetic signature in rocks, and so it has been a critical tool in paleomagnetism, a science important in understanding plate tectonics and as historic data for magnetohydrodynamics and other scientific fields.mall grains of magnetite occur in almost all igneous and metamorphic rocks. Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5â6 and a black streak. The chemical IUPAC name is iron(II,III) oxide and the common chemical name is ferrous-ferric oxide.