Rocks are made of minerals. Only a few minerals are rock forming and most rock is made from a combination of the commonest of these mineral elements. People value and search for minerals for many different reasons. Precious metals are used in commerce and other minerals are valued as gems, ranging use from interior design, jewellery or even fengshui enhancer
Crystals are solid material in which the atoms are arranged in regular geometrical patterns. Temperature, pressure, chemical conditions and the amount of space available are some of the things that affect their growth. Many crystallise from watery solutions, some from molten rock as during volcanic eruptions when lava cools rapidly.
