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Vintage Brazilian green emerald, emerald cut, 13.03 carats and with dimensions 15.6 x 13.3 x 7.6 mm.

Beryl is the chief ore of the element beryllium and is mined in large quantities throughout the world. The ore material is opaque, but transparent beryl is also widespread and is cut into faceted gemstones. Like tourmaline, pure beryl is colorless (goshenite) but chemical impurities in the growth environment impart a huge variety of hues, creating "color varieties". Manganese yields pink beryl, called morganite, and iron can produce yellow, or "golden" beryl, as well as a blue or blue-green variety called aquamarine, named after the color of dsea water.

Chromium in beryl produces a dark green variety called emerald. Emerald has, for millennia, been considered (along with diamond, ruby and sapphire) to be a "precious" (i.e. high value) gemstone

Beryl typically forms in coarse granitic rocks called pegmatites, in which the element chromium is very seldom found. The dark rocks that usually contain chromium are formed in ways that are not condusive to the crystallization of beryl. This disparity is why emeralds are rare. Chromium also has a hard time fitting comfortably within the beryl structure, and the resulting stress forces crystals to grow with numerous imperfections. Emeralds are therefore never truly flawless - a good thing, in fact, because the characteristic inclusions in natural emeralds allow them to be distinguished from the many synthetic emeralds that pervade the gemstone marketplace. The jewelry trade has tried to improve the psychology of seeing pervasive flaws in a gemstone by calling emerald inclusions "jardin" (French for "garden"). Emeralds are almost always treated to minimize the prominence of these inclusions, by means of oil, plastic and other substances that fill cracks and allow light to pass through them instead of being reflected. It has reached the stage where all emeralds are assumed to be treated in some way, and a premium is placed on emeralds than can be proven to be untreated.

The finest emeralds come from Colombia, Afghanistan, the Malagasay Republic (Madagascar), Zimbabwe and Russia. Brazil also produces large quantities of emerald, much of which contains only a trace of chromium. These stones are true emeralds but not as dark a green as stones from other localities. They are also typically filled with interesting inclusions, making them more translucent than transparent. Price in gems is almost always a function of color, clarity and size, so these typical Brazilian emeralds are far less expensive than the rare and costly clean, dark green gems we see in museums and large estates. One positive aspect of the lower-grade Brazilian stones is that they are almost never treated, so the color and clarity are usually natural.

This Brazilian emerald is typical of the locality but has an unusually high degree of transparency. It is amazing to consider that the same stone, if dark green and eye-clean, might cost more than $250,000!

Emerald is the birthstone for May. It is reputed by gem healers to enhance memory, quiet emotions, and improve eyesight.

The price is for the one faceted Brazilian emerald, which we guarantee to be natural material and produced in the early 1970s, and includes insurance within the U.S.

► PLEASE NOTE: One of the photographs shows several of the books Joel has written. The Color Encyclopedia of Gemstones has for more than 30 years been the world's most authoritative source of information on (and pictures of) gemstones, including many of the rare gems, such as andalusite. (books not included in purchase!) We want you to feel 100% confident purchasing from us. Book not included in this listing!◀
Debby & Joel Arem

EMERALD Gemstone Vintage Loose Faceted Green 13.03 cts fg31


  • Vintage Supply from the 1970s
  • Materials: emerald stone, semiprecious emerald, emerald gem, emerald gemstone, faceted emerald, beryl, emerald, brazilian emerald, green gemstone, vintagegreen gemstone, recycled green gemstone, emerald cut gem
  • Ships worldwide from Maryland, United States
  • Feedback: 9749 reviews
  • Favorited by: 5 people