Not all crystals form in water. Some crystals can form in an element called carbon. However, all crystals are formed in the same way, the atoms come together and become a uniform cluster. The process can take anywhere from a few days to maybe a thousand years.
Natural crystals that come from Earth form in the same way. These crystals formed more than a million years ago within the Earth's crust. They occur when the Earth's liquid consolidates and the temperature cools. Other crystals form when liquid crosses crevices and dispenses minerals to the crevices.
Small-sized quartz crystals can form in as little as one day. Crystals larger than several kilograms can form in just a few months. The growth rate is determined by heat and pressure conditions, as well as by the availability of silica and water nutrients. The formation of quartz requires a gradual and slow cooling of the magma or a gradual precipitation of the hydrothermal solution.
Quartz crystals take thousands of years to form. Rapid processes produce massive microcrystalline or semitransparent quartz without the correct crystal shape. Crystallography is the science that measures the crystal structure (in other words, the atomic arrangement) of a crystal. These crystals are colored with the help of modern heat treatment of certain types of amethyst crystals that can be found naturally in igneous rocks.
The most common bright crystals are well-formed cubic crystals of fluorite, calenohedral, prismatic calcite, apatite, corundum (ruby and sapphire), aragonite, scheelite and selenite, gypsum. In the last block of ice, each of the small crystals (called “crystallites” or “grains”) is a true crystal with a periodic arrangement of atoms, but the entire polycrystalline does not have a periodic arrangement of atoms, because the periodic pattern breaks at the boundaries of the grains. In 1999, the world's largest known natural crystal was a beryl crystal from Malakialina, Madagascar, 18 m (59 ft) long and 3.5 m (11 ft) in diameter, and weighing 380,000 kg (840,000 lbs). The largest known crystal of a native element is a seven-inch sulfur crystal found in the Perticara mine, Urbino, Italy.
If you're looking for the shape of quartz crystals with golden-yellow needle-shaped rutile inclusions, rutilated quartz crystals are the answer. Crystals that are perfectly crystallized minerals can also produce different color glows under UV light. However, existing crystals will continue to grow and SiO4 tetrahedrons will be added layer by layer to further improve and complete these existing crystals. These ghostly layers form over hundreds of years inside a crystal due to the rest of the hot water solutions trapped inside the cavities of the preformed glass.
The crystals found in rocks usually range in size from a fraction of a millimeter to several centimeters in diameter, although exceptionally large crystals are occasionally found. Under the old Garbage In %3D Garbage Out rule, a crystal structure is only as good as the glass used for data collection. Small holes reduce the maximum resolution at which the crystal is diffracted, while larger holes destroy the glass. However, the process that forms quartz crystals is very complex and requires immense pressure to form these crystals over the years.
For example, selenite crystals larger than 10 meters are found in the Cueva de los Cristales in Naica, Mexico.