Today, the term rock crystal is sometimes used as an alternative name for transparent coarsely crystalline quartz. The Ancient Greeks referred to quartz as κρύσταλλος ( krustallos) derived from the Ancient Greek κρύος ( kruos) meaning "icy cold", because some philosophers (including Theophrastus) apparently believed the mineral to be a form of supercooled ice. The word "quartz" is derived from the German word "Quarz", which had the same form in the first half of the 14th century in Middle High German and in East Central German and which came from the Polish dialect term kwardy, which corresponds to the Czech term tvrdý ("hard"). Quartz is the mineral defining the value of 7 on the Mohs scale of hardness, a qualitative scratch method for determining the hardness of a material to abrasion. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia. There are many different varieties of quartz, several of which are classified as gemstones. Since the transformation is accompanied by a significant change in volume, it can easily induce microfracturing of ceramics or rocks passing through this temperature threshold. The transformation from α-quartz to β-quartz takes place abruptly at 573 ☌ (846 K 1,063 ☏). Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is a hard, crystalline mineral composed of silica ( silicon dioxide). Lattice: hexagonal, Piezoelectric, may be triboluminescent, chiral (hence optically active if not racemic) Insoluble at STP 1 ppm mass at 400 ☌ and 500 lb/in 2 to 2600 ppm mass at 500 ☌ and 1500 lb/in 2 181) Ĭolorless through various colors to blackĦ-sided prism ending in 6-sided pyramid (typical), drusy, fine-grained to microcrystalline, massiveĬommon Dauphine law, Brazil law and Japan lawħ – lower in impure varieties (defining mineral)Ģ.65 variable 2.59–2.63 in impure varietiesġ670 ☌ (β tridymite) 1713 ☌ (β cristobalite) If you have health concerns, please seek medical advice from your medical practitioner.Β-quartz: trapezohedral (class 6 2 2) *Crystals provide a holistic method of energy balancing and are not meant as a substitute for medical advice or medicine. *The information listed on this website is for informational purposes regarding our products. It may also be used to align and purify all chakras, allowing for the Rainbow Light Body activation and integration. Use Angel Aura at the Throat Chakra for loving communications, in romantic pursuits, in caring for children and the aged, and in all healing situations. It is a marvelous aid for recognizing beauty, from Nature and Spirit, from within, and in others. Angel Aura assists in remembering lessons from past incarnations and attuning to one’s spiritual purpose. Meditating with this crystal allows one to enter a state of serenity and peace, purification and rest, and to go beyond the body to perceive and receive help from one’s angel guides. It carries a very loving and sweet energy, stimulating the spirit and elevating one’s mood. Natural elements are bonded to the surface of the quartz, creating an amazing aurora borealis effect.Īngel Aura Quartz / Amethyst Clear Quartz bonded with Platinum and Silver, sometimes Gold or other trace metals exhibits a light blue, rainbow and silvery iridescence like the gossamer wings of angels. With the shiny iridescent shimmer and metallic rainbow luster eludes nature yet are visually a marvel. Very glossy and mirror like with a strip of matte crystal inclusions of Calcite and other mineralsĨ83 grams 1 pound 15 oz + Measures 4.5+ inches high x about 4 inch x 1.5 inches at its widest base.Īura crystals are mesmerizing in their beauty. Well defined points, mountain like in appearance. Raw and rough shape as found with cut base to allow it to stand freely on its own. Angel Aura Amethyst Geode Cut base point.
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