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Chrome-bearing fuchsite (a variety of muscovite mica) is the classic inclusion, and gives a silvery green or blue sheen. Oranges and browns are attributed to hematite or goethite. Because aventurine is a rock, its physical properties vary: its specific gravity may lie between 2.64-2.69 and its hardness is somewhat lower than single-crystal quartz at around 6.5.

Aventurine feldspar or sunstone can be confused with orange and red aventurine quartzite, although the former is generally of a higher transparency. 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." This is an allusion to the chance discovery of aventurine glass or goldstone at some point in the 18th century. Although it was known first, goldstone is now a common imitation of aventurine and sunstone. Goldstone is distinguished visually from the latter two minerals by its coarse platelets of copper, dispersed within the glass in an unnaturally uniform manner. It is usually a golden brown, but may be stained blue to create "bluestone."

The majority of green and blue-green aventurine originates in India (particularly in the vicinity of Mysore and MadrasChennai in Tamil), formerly known in English as Madras is a sprawling port city on the shores of the Bay of Bengal. One of the major Metropolitan cities of India, it is also the capital of Tamil Nadu state in southern India. It is India's fourth largest c) where it is employed by prolific artisans. Creamy white, gray and orange material is found in ChileThe word chile may also refer to Chilli pepper. The Republic of Chile is a republic located on the southwestern coast of South America. It is a long and narrow piece of land between the Andes mountains and the Pacific Ocean. It shares borders with Argenti, SpainThe Kingdom of Spain is a country located in the southwest of Europe. It shares the Iberian Peninsula with Portugal, Gibraltar and Andorra. To the northeast, along the Pyrenees mountain range, it borders France and the tiny principality of Andorra. It inc and RussiaThe Russian Federation ( Russian: , transliteration: Rossiyskaya Federatsiya or Rossijskaja Federacija , or Russia (Russian: , transliteration: Rossiya or Rossija , is a country that stretches over a vast expanse of eastern Europe and northern Asia. With. Most material is carved into beads and figurines with only the finer examples fashioned into cabochonA cabochon or cabouchon is a gemstone which has been shaped and polished as opposed to facetted. The resulting form is usually a convex top with a flat back, although the term is used to mean any deliberate shape that is not facetted. Cutting "en cabochons, later being set into jewelleryJewellery (spelled jewelry in American English) consists of ornamental devices worn by persons, typically made with gems and precious metals. Costume jewellery is made from less valuable materials. However, jewellery can and has been made out of almost ev.

See also: optical phenomena, list of mineralsThis page is intended as a list of all minerals. Sorted by name: External Links A Abelsonite Abenakiite-(Ce) Abichite (not a valid species) Actinolite Agate (not a valid species variety of quartz) Alabaster (not a valid species variety of gypsum or calcit