Igneous Rocks are formed by crystallization from a liquid, or magma. They include two types. Magma is a mixture of liquid rock, crystals, and gas. Characterized by a wide range of chemical compositions, with high temperature, and properties of a liquid.
One of the earliest forerunners of modern ice cream was a recipe brought back to Italy from China by Marco Polo. The recipe was very like what we would call sherbet. From there, it is thought that Catherine de Medici brought the dessert to France when she married King Henry II in 1533.
Ice cream received a further boost when, in the 1870s, Carl von Linde of Germany invented industrial refrigeration. This, along with other technological advances like steam power, motorized vehicles, and electric power, made ice cream that much easier to produce, transport, and store.