The solid material of the earth's crust is made of rock. Rocks are made of minerals. Minerals are made of one material. Some mineral properties are color, hardness and luster. Properties of minerals are used to find out which minerals make up a rock.
Calcite is a mineral which bubbles when placed in an acid such as vinegar.
Granite is a rock made of the minerals mica, feldspar, quartz, and hornblende. Misconceptions During assessment, a few students incorrectly stated that a rock was hard and a mineral was not. We think this misconception occurred during the scratch test section because we only scratched minerals, not rocks. Low Graphics Main Index Page maintained by Kerrie Swan .