Basically, the most important element is crystal "silica" (sio2), and "Si"
(silica) is also composition of the Earth's crust about 65 percent over the most
important minerals which also contains various trace metals, it would create all
kinds of different colors of crystal, and crystal will be broad in nature and the
various fossil "symbiotic" together, such as mica, feldspar, calcite, tourmaline
and rutile, granite and so on.
Crystal growth environment, the more underground, in caves, the need for rich
groundwater sources, groundwater containing saturated silica addition, the
pressure of the situation and will take about at the same time in the atmospheric
pressure around twice to three times, in 550-600 ° C temperature required, to
give appropriate time, Crystal will be in accordance with the "six-party crystal
system" (hexagonal system) laws of nature, and crystallization of the six-party
into a columnar crystal.