Aventurine

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Jewelry 101--Colored Stones

Aventurine

Considered a “lucky stone” the very name of aventurine derives from the Italian "a ventura" meaning "by chance". Aventurine is a variety of chalcedony (microcrystalline quartz) and has the unique glistening effect known as aventurescence. This effect is caused by inclusions, or flaws, in the stone and the size and density of the inclusions influence the intensity of the aventurescence.

Containing small included flakes or scales that give it a glistening effect, aventurine is a compact variety of quartz/chalcedony. The inclusions are usually muscovite mica, but may also be hematite or goethite.
Aventurine can be gray, orange, or brown but is most often associated with green.
The green coloring agent of green aventurine is fuschite, which is a chromium-rich variety of muscovite. This gemstone can range from a light to dark green color.
The orange and brown colors of aventurine are attributed to hematite or goethite.
The shimmering or glistening effect of aventurine can be weak or more intense, depending on the size and density of the inclusions. This effect is known as aventurescence.
Though usually removed when polished into a gemstone, most aventurine has a grainy or sugary texture in its natural state.
Aventurine is often banded and an overabundance of fuchsite may render it opaque, in which case it may be mistaken for malachite at first glance.
The name aventurine derives from the Italian "a ventura" meaning "by chance".
The majority of green and blue-green aventurine originates in India (particularly in the vicinity of Mysore and Chennai) where it is employed by prolific artisans. Creamy white, gray and orange material is found in Chile, Spain and Russia.
Most aventurine is carved into beads and figurines with only the finer examples fashioned into cabochons to set into jewelry.

Specs

Chemical Formula	SiO₂	Mineral Class	Quartz / Chalcedony
Color	Blue, Green, Yellow, Orange, Brown, Gray
Crystal System	Hexagonal	Hardness	6.5-7
Transparency	Opaque. May be translucent when backlit on the edges.	Luster	Vitreous, waxy
Refractory Index	1.544 - 1.553	Double Refraction	0.009

Legends

Green aventurine, known as the “Stone of Opportunity”, was thought to be the luckiest of all crystals, especially in increasing prosperity and wealth and for bringing luck in physical competitions or games of chance. Its winning energy makes it a great ally for enhancing one’s chances in any situation.

Green aventurine, with a strong connection to the earth, provides a better understanding and appreciation of nature and its soothing vibrations upon the mind and body.

Some believe that wearing aventurine also absorbs electromagnetic smog and guards against environmental pollution. Also, taped to a cell phone, it protects against its emanations.

It is also believed green aventurine energetically stimulates the physical growth of premature infants, young children and teenagers. In increasing overall vitality aventurine enhances the intellectual development of children struggling with schoolwork and destructive hyperactivity. It also assists adults with written work, typing and computer skills, and is beneficial to all in overcoming clumsiness.

Ideal for soothing quick-tempers or brutal temperaments, it can greatly diminish the effects of domestic strife between spouses.

Green aventurine may be used as a love crystal or added to a heart chakra layout as it encourages love later in life.

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