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Aura Quartz refers to a family of treated quartz crystals that have been artificially coated with a thin layer of metal, typically gold, platinum, titanium, or silver, to create an iridescent, metallic sheen. The base material is natural quartz, which is silicon dioxide (SiO2). The treatment process permanently bonds the metal to the quartz surface, resulting in a vibrant, often rainbow-like, appearance that is not found in natural quartz. The color and specific iridescence depend on the metal(s) used in the coating process. For example, Aqua Aura Quartz is typically coated with gold, resulting in a vibrant blue; Angel Aura Quartz often uses platinum and/or silver for a pearly, iridescent sheen; and Titanium Aura Quartz uses titanium for a multi-colored, rainbow effect.
How to Identify
- Color
- Highly variable, depending on the metallic coating. Common colors include iridescent blue (Aqua Aura), iridescent rainbow (Titanium Aura), iridescent pink/purple (Rose Aura), and iridescent clear/white (Angel Aura). The color is a surface phenomenon.
- Luster
- Strongly metallic to sub-metallic, often with a distinct iridescent or rainbow-like sheen, unlike the vitreous luster of natural quartz.
- Texture
- Smooth, glassy surface, identical to the underlying quartz, but with a thin, sometimes slightly uneven, metallic coating. The coating can sometimes show microscopic imperfections or variations in thickness.
- Crystal Form
- Retains the crystal habit of the original quartz, typically hexagonal prisms terminated by rhombohedra. Can be found as single crystals, clusters, or points.
- Cleavage
- None, same as natural quartz. Exhibits conchoidal fracture.
- Geological Environment
- Not found in geological environments. It is an artificially created material produced in specialized laboratories or industrial facilities.
Key Facts
- Hardness: 7 on the Mohs scale (of the underlying quartz). The coating itself is very thin and can be scratched, though it is generally durable.
- Specific Gravity: 2.65 g/cm³ (of the underlying quartz). The thin metallic coating has a negligible effect on the overall specific gravity.
- Crystal System: Trigonal (of the underlying quartz).
- Color: Artificially induced iridescent colors (e.g., blue, rainbow, pink, clear with rainbow sheen).
- Luster: Metallic to sub-metallic, iridescent.
- Transparency: Transparent to translucent (of the underlying quartz), with the metallic coating creating an opaque or semi-opaque iridescent layer.
- Fracture: Conchoidal (of the underlying quartz).
- Cleavage: None (of the underlying quartz).
- Composition: Silicon dioxide (SiO2) with a thin, molecularly bonded coating of various metals (e.g., gold, platinum, titanium, silver).
Quick Check
- Color: Vibrant, often unnatural-looking iridescent colors (blue, rainbow, pink, clear with rainbow sheen).
- Luster: Strong metallic to sub-metallic, highly iridescent.
- Streak: White (due to the underlying quartz, as the coating is too thin to produce a streak).
Physical Characteristics
- Crystal Habit: Typically prismatic, often terminated by rhombohedra, reflecting the original quartz crystal habit.
- Cleavage Type: None.
- Fracture Type: Conchoidal.
- Tenacity: Brittle (of the underlying quartz).
- Luster Type: Metallic to sub-metallic, iridescent.
Formation
Aura Quartz is not a naturally occurring mineral. It is produced by a process called vacuum deposition or magnetron sputtering. Natural quartz crystals (SiO2) are heated in a vacuum chamber to temperatures typically between 800-900°C. A vaporized metal, such as gold, platinum, titanium, or silver, is then introduced into the chamber. The metal atoms bond to the surface of the quartz at a molecular level, forming a thin, iridescent metallic coating. The specific metal used dictates the resulting color and iridescence.
Usage
Primarily used in jewelry, ornamental objects, and as collector's specimens due to its vibrant, iridescent colors. It is also popular in metaphysical and New Age practices, where it is believed to possess enhanced energetic properties.
Age Distribution
Not applicable; it is a modern treated material.
Where to Find
Not naturally occurring
Aura Quartz is a man-made product and is not found in any natural geological locations. It is produced in facilities that specialize in crystal treatment and coating processes.
Finding Tips
Source from Reputable Dealers
Since Aura Quartz is a treated material, ensure you purchase from reputable dealers who clearly disclose the treatment process and the metals used. This ensures you are getting what you expect and not a mislabeled or inferior product.
Examine the Coating
While the coating is durable, examine the surface for any signs of flaking, scratching, or uneven application, which might indicate lower quality treatment. The iridescence should be consistent across the surface.
Understand the Base Material
The quality of Aura Quartz is also dependent on the quality of the underlying natural quartz. Look for clear, well-formed quartz crystals as the base for the best aesthetic results.
Similar Rocks
Natural Quartz
Quartz (SiO2)
Also known as: Rock Crystal, Amethyst, Citrine, Rose Quartz, Smoky Quartz
Iridescent Hematite
Hematite (Fe2O3)
Also known as: Rainbow Hematite
Labradorite
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
Also known as: Spectrolite
Scientific Classification
- Mineral Class
- Silicate (Tectosilicate) - referring to the base quartz.
- Group
- Quartz Group (referring to the base quartz).
- Crystal System
- Trigonal (referring to the base quartz).
- Chemical Formula
- SiO2 (with metallic coating, e.g., Au, Pt, Ti, Ag).
- Composition
- Silicon dioxide with a surface layer of vapor-deposited metal atoms.
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