How to distinguish aventurine and jade?

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Aventurine has long been a popular jewelry material. Inserts, beads, beads of various shapes in a variety of decorations. “Golden Sand” is a golden brown aventurine, “Cairo Night” is a dark blue, similar to the night sky. Most often, aventurine is found in the “Natural Stones” section, and attracts many with its mysterious sparkle.

Natural mineral

True aventurine is a natural mineral, a fine-grained variety of quartz. It contains scattered clusters of tiny mica flakes that sparkle in bright light. Aventurine may also contain other inclusions that affect its shades. The stone comes in various shades of red-brown, dull yellow, brown, but the most common are aventurines of green shades. It is natural green aventurines that can most often be found in jewelry.

Aventurine is a fairly hard mineral, the hardness is estimated at 6-7 points on the Mohs scale. After grinding it acquires a glossy glass shine. The shades of natural stone are soft and dull. Authenticity is always revealed by a small, scattered sparkle. The rock contains tiny inclusions of mica – like fairy dust.

A big difference

In the modern jewelry market, an interesting paradox is associated with aventurine. It is natural green aventurine that is in the vast majority of cases sold as jade. These stones are really similar visually, and it can be not so easy to distinguish them. Moreover, such “adventurous” jade can be used not only in relatively inexpensive crafts, but also as jewelry inserts in products made of precious metals. But it’s not difficult to solve this mystery: you just have to look closely at the surface of such “jade” under bright light. Aventurine will always give itself away with sparkling inclusions. Natural jade has a matte, uniform structure without sparkling inclusions. Although outwardly these minerals can indeed be very similar. The third in this company may be jadeite. But we have already written about these minerals earlier.

Imitation impostors

Despite all of the above, what you can most often find on sale as aventurine is not a natural mineral, but just its glass imitations. The most popular are golden brown and dark blue. Less common is dark green. All types are united by a bright shine and thick shimmer of sparkling inclusions. In artificial aventurine, or more precisely in aventurine glass, the shiny elements are quite large and randomly located, varying in size and brightness. And “aventurine” itself is bright, rich in shade and deep in color. By the way, being glass and not a natural mineral, such aventurine is very fragile. The slightest blow to the jewelry often leaves chips and damage to the jewelry. And sometimes the material can completely crumble.

Glass with aventurine effect has been known to mankind for a long time. Even in Ancient Egypt, beads from a similar material were used to make jewelry. However, the recipe was lost and such glass was only recreated in the 17th century in Venice. According to legend, the invention of aventurine was purely an accident. Hence the name of the glass – aventurine “random” (from Italian aventura). Once a Murano master glassblower spilled copper shavings into a hot glass mass-blank, and the result was glass with an unexpected sparkling effect. Subsequently, the natural mineral began to be called this way. And people liked the “defective” glass and still enjoy great success to this day. The recipe for making Venetian aventurine glass was kept secret for a long time. Later, in other European countries they tried to repeat the aventurine effect, using iron filings rather than copper to create a shimmering effect.

Currently, cobalt oxides are used to create dark blue aventurine glass “Cairo Night”, chromium oxides are used for dark green, and iron oxides are used to create golden brown “Golden Sand”.

When you come across aventurine glass on sale, always remember its artificial origin and do not allow unscrupulous sellers to pass it off as a natural stone. Better look for natural aventurine and try to see its magical soft sparkle under bright light. Whether it is an ordinary tumbling mineral specimen, beads or a bracelet, natural aventurine and aventurine glass are completely different things.