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Skip to main Skip to footer. Earth Sciences Museum. Walking tours Book our space Group Programs Volunteers. Formation: Beryl is often found in granites and granitic pegmatites but it can also be found in metamorphic rocks or in the veins and cavities of limestones and marbles. Colouration: Beryl forms hexagonal crystals which can be almost any colour depending on the type and amount of impurities.
Goshenite : A beryl which lacks colour. There are a number of impurities which can lead to this lack of colour. Morganite : This variety of beryl gets its colouration from both manganese and iron impurities. The amount and location of these impurities can cause the beryl to be different shades of pink and yellow.
Morganite is found in four different parts of the United States and in two other countries. Bixbite : An extremely rare variety of red beryl. No forms of bixbite have been found outside of the United States. Transparent to opaque. Specific Gravity. Vitreous , waxy. Uneven to conchoidal. Other ID Marks.
Occasionally fluorescent yellow, light blue, purple, pink, or red. Complex Tests. Insoluble in acid s. In Group. Silicates ; Cyclosilicates. Striking Features. Crystal form and hardness. Beryl is most well-known from granite pegmatite s. It can also be found in metamorphosed mica schist s and in igneous rhyolite deposits.
Rock Type. Igneous , Metamorphic. Popularity Prevalence Demand Aquamarine - Sky blue to bluish-green variety of Beryl.
Bazzite - Mineral very similar to Beryl but with some of the rare element scandium replacing some of the aluminum in its chemical structure. Bixbite - Occasionally used to describe the rare form of Red Beryl from Utah. Emerald - Green gem variety of Beryl. Golden Beryl - Golden yellow to orange-yellow variety of Beryl.
Goshenite - Colorless or white variety of Beryl. Green Beryl - Pale green variety of Beryl. Heliodor - Greenish-yellow to yellow variety of Beryl. Morganite - Pink to light purple variety of Beryl. Pezzottaite - Pezzottaite is a newly identified raspberry-red mineral very similar to Beryl Pezzottaite, but contains lithium as well as some of the rare element cesium replacing some beryllium in its chemical structure.
Create Your Own Keepsake. Citrine Engagement Rings. Citrine Rings. Citrine Earrings and Pendants. Beryl Meaning, Powers and History Beryl is a mineral composed of beryllium aluminum cyclosilicate. It is a very popular mineral in all of its forms.
The hexagonal crystals and can be found in small to very large sizes. Colors range green to blue to red, yellow, and white. Stones are often waxed or oiled to hide fractures and surface-reaching inclusions.
Heating and drilling are often done to reduce the visibility of inclusions. Even after these treatments, a person with a small amount of knowledge can usually look into a display case at the typical mall jewelry store and with reasonable success identify natural stones and lab-created stones by their clarity. Lab-created stones have a bright green color and are transparent. Natural stones are usually translucent or have visible inclusions and fractures.
Natural stones without these characteristics are extremely rare and have a very high price. Many people prefer natural stones and their visible flaws. Others prefer the clarity and color of lab-created stones and their significantly lower price. Lab-created emeralds account for a significant percentage of the stones on display and being sold in many department stores and mall jewelry stores. The specimen is approximately 14 x 12 x 7.
Aquamarine is the second-most-popular gem beryl and is the birthstone for the month of March. Like emerald, its identity is defined by its color. Aquamarine has a distinct greenish blue to blue color. Unlike emerald, light-colored stones in this color range are still called aquamarine. The stones that are richly colored are the most desirable, and the stones with a very pale color are made into inexpensive jewelry. Aquamarine differs from emerald in another way - it normally has far fewer inclusions and fractures.
Most of the aquamarine seen in mall jewelry stores is usually eye clean and without visible fractures. The color of aquamarine can usually be improved by heating. Most stones entering the retail market have been heated.
Many of the greenish blue stones offered for sale were distinctly bluish green or even yellow beryl before treatment. Morganite: An interesting specimen of morganite with tourmaline crystals from the Pederneira Mine in Minas Gerais, Brazil. This specimen has been nicknamed the "Sword in the Stone. Morganite , also known as "pink beryl" and "rose beryl," is a rare variety of beryl that ranges in color between yellowish orange, orange, pink, and lilac. Trace amounts of manganese are the cause of color in most morganite.
Morganite is the third most commonly seen variety of beryl in jewelry stores, but the selection is often limited, and stones with top color are very hard to find. Most morganite sold in jewelry has been heat treated to improve its color. Heating generally removes traces of yellow from the stone and converts orange or yellowish stones into a more desirable pink color.
Some morganite has been irradiated to deepen its color. Synthetic morganite has been produced but has not been widely marketed because morganite is not well known to consumers. Until about , three things severely limited the popularity of morganite: 1 most specimens were very light in color; 2 jewelry manufacturers were hesitant to make a large commitment to the gem because they did not have a steady source of supply; and, 3 consumers were not familiar with morganite because it had never been strongly promoted.
However, starting in about , discoveries of morganite in Brazil and improved methods of heat treatment increased the supply of morganite and improved the color of material with a weak saturation. Since then an increasing amount of moranite jewelry has been appearing in stores. Heliodor: A highly etched greenish yellow heliodor crystal of gem quality from Ukraine. The etching most likely occurred when acidic hydrothermal solutions came into contact with the crystal. Approximately 4.
Yellow beryl , also called "golden beryl" or "heliodor," is a yellow to greenish yellow beryl. Yellow beryl is a durable stone that often has a beautiful yellow color and a relatively low price. The public is not especially familiar with the gem, and as a result the demand is low and so is the price.
People who enjoy yellow gems and want an item of jewelry with a yellow beryl will have a hard time finding it at most jewelry stores. It is most often seen in the inventory of a jeweler who does custom designs. A few vendors call it "yellow emerald. This is a direct quote from the Federal Trade Commission's Guides for the Jewelry, Precious Metals, and Pewter Industries page 7, section V : "The Commission proposes adding a new section that states it is unfair or deceptive to mark or describe a product with an incorrect varietal name.
Small amounts of iron are thought to produce the color of yellow beryl, which can often be changed with heating or irradiation. Despite the fact that many specimens of yellow beryl depreciate with treatment to less valuable colors, some specimens can be heated to a greenish blue similar to aquamarine, while others can be irradiated to produce a more desirable yellow color.
Those with plans to treat yellow beryl must experiment because treatment success is variable. Beryl Gems: Faceted beryl gems, clockwise from bottom left: aquamarine, morganite, and heliodor, all from Madagascar; green beryl from unknown locality.
Some is colored by chromium or vanadium and does not have the proper hue, tone, and saturation to be called "emerald. The price difference between green beryl and emerald is significant, so some buyers or sellers hope to have specimens judged in their favor. This can lead to problems because a precise color boundary between emerald and green beryl has not been defined with industry-wide agreement. Green beryl can be an attractive gem, but it is rarely seen in jewelry. Natural Red Beryl: The photo above shows a faceted red beryl with a beautiful medium red color.
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