Loose faceted Lavender Amethyst cut oval 2.9 cts 14x9x5mm M928

General Gemstone Details
Quartz is a power stone, and has been called as well as considered world wide as the Universal Crystal.   It is the most recognized type of crystal, and what many people envision when the thought of crystal comes to mind.   In fact there are many different types of Quartz, in quite a variety of colors. 
Rock Crystal Encompasses a large family of stones and crystals, all of which are made up primarily of silicon dioxide, one of the most common and most important substances in the world. Crystals of pure Quartz, generally six-sided, can be found in all shades and colors. Quartz crystals grow singularly or in groups and take on different shapes according to the temperature at the time of their formation. Quartz crystals can also contain other minerals frozen within, as in Rutilated Quartz. Quartz can be formed of microscopic crystals and take on entirely different appearances and qualities. 

Quartz can be a bit of a confusing stone, as it encompasses a great many varieties that often are thought to be gemstones on their own, but are in fact another type of quartz.  As well, within the quartz family there are other stones, which have their own little families as well.  Here is a breakdown of the most common quartz varieties

Scientific Properties
Mohs Hardness of 7 with a trigonal crystal structure.
The name quartz comes from the Greek derivative krustallos, meaning ice, as it was thought that quartz was actually ice formed by the Gods.  Since the Middle Ages, crystal balls made of rock crystal have been used to predict the future.

Mystical Properties
Visual clarity normally isn't as important to a quartz crystal's energetic quality and ability to amplify subtle energies around it.  Quartz enhances energy by absorbing, storing, balancing, amplifying, focusing and transmitting the energy...it channels universal energy as well, and is quite successful for energizing other crystals. 
Quartz  crystals can raise energy to the highest possible level, it enhances thoughts, as they are a form of energy, and it is extremely beneficial for manifesting, healing, meditation, protection and channeling. Containing every possible color, Clear Quartz works on all levels of the being.  Storing information like a natural computer, these crystal are like a spiritual library waiting to be accessed. It is also quite beneficial for storing and retrieving information of all types, being that information has it's own energy pattern as well. This makes the quartz invaluable for programming. Paired with it's ability to balance this is an excellent stone for harmonizing and balancing one's immediate environment, and even personal relationships.

Quartz has the ability to dissolve karmic seeds, holding a quartz crystal in your hand, actual doubles your biomagnetic field. It generates electro magnetism and dispels static electricity.

Quartz is commonly used to dispel negativity and clear away negative energy. A stone of clarity it can be used to purify and clarify on the spiritual, mental as well as the physical planes. One of the most protective gemstones, quartz will protect the spirit as it enhances spiritual grown, and wisdom.  It is also quite beneficial for clarifying the emotional processes, which in turn will enlighten your creativity and inspiration.  A stone used for studying and retaining information as is helps with concentration and retaining what is learned.

Psychically, quartz is a powerful stone; used for protection as it counters black magic and protects from negative energy. It is very useful on the third eye chakra for clarity of psychic vision, and can be used to communicate with spirits and other worlds. Quartz is a stone that can access ancient wisdom and bring it into the present. It is also a very good stone for astral travel, manifestation, scrying, channeling, dream recall and dream work.

Healing Properties
Quartz is probably the most versatile, multipurpose, powerful healing stone on the planet due to is unique helical spiral crystalline form. It is a master healer and can be used for any and all conditions. It's stimulates the immune system and brings the body into balance.  It takes the energy to the most perfect state that is possible;  going back to before the dis-ease set in.  It cleanses and enhances the organs and subtle bodies and acts as a deep soul cleanser, connecting the physical dimension with the mind.
Being that it is easy to cleanse, it can store information and energy, is easy to program, and will amplify energy and healing properties of other stones.  It can both send and draw energy, it stimulates natural crystals in the body tissues and fluids to resonate a new healing frequency, and there are