In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.
Each year, on the afternoon of Palm Sunday, at 5 PM, people gather around his [August Vandekerkhove] grave at the cemetery of Flacé, rue Ambroise Paré, in Mâcon in France to remember him.
The concept of mineral is distinct from rock, which is any bulk solid geologic material that is relatively homogeneous at a large enough scale.
The concept of mineral is distinct from rock, which is any bulk solid geologic material that is relatively homogeneous at a large enough scale.