Many books have been written on quartz and its many varieties.This work is dedicated to all those anonimous mineralogists, who wrote about quartz.

This piece of work is an overview of the varieties you can find, with photos and text on additional pages for inclusions and associations minerals of euhedral quartz crystals. Over 500 pictures for our readers!

Quartz crystal is just what you want to be aware of, of how interesting all the many aspects of quartz can be, and we'll let you choose from where to begin.Quartz has certainly the most collected varieties of any other single mineral species.

Quartz is composed of an orderly arrangement of silicon and oxygen, so that we may describe its internal structure and present its chemistry by a representative formula SiO2. We know that quartz is the low-temperature stable form of silicon dioxide or silica. Several other forms of silica exist at higher temperatures and pressures.
Quartz forms under a temperature range, the upper limit of which is 867°C at one atmosphere of pressure. Two forms of quartz exist: alpha-quartz, which is stable from the low end of the temperature range up to 573° C and beta-quartz, which has stable form only at high temperature, from 573° to 867° C. Beta-quartz is relatively uncommon, in most occurrences appear as small equidimensional crystalsbeings.
At room temperature, beta-quartz is meta-stable, inverts an changes its internal structure to that of alpha-quartz.

Quartz is the second most common mineral in the earth's crust, but is probably the most collected. There are many types of quartz, such as: bubble quartz, smoky quartz, phantom quartz, Gwindel, sceptre, misshapen crystals, tabular, faden, sprossen quartz, skeletal, twisted etc.These are not strictly crystallographycal terms, but they come from habits and growth patterns exhibited by quartz crystals .

They are different ways crystals can look. Quartz crystal can be either simple or complex in form, depending on the local geologic history, for example twins (Dauphinè, Brasil and Japan law),acute rhombohedral and equant habit : this is crystallography!

Inclusions of other minerals can be found inside quartz crystals. Some are lovely, others have mud in them, you can find many things captured by quartz. Liquid or solid inclusions, or minerals mechanically included, or other materials, as revealed
by phantoms crystals.

Euhedral quartz crystals frequently contain acicular inclusions of actinolite, horneblende, byssolite, tourmaline, rutile; speciments have been found of quartz crystals containing inclusions of platy hematite, mica, goethite and some more : anatas, brookite, arsenopyrite, pyrite, epidote, chlorite etc,etc.