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Pink Emerald

E1144 | medium | play | left | “Emerald ID: E1144 – Weight: 0.96 Carats – Origin: Zambia”Within the professional field of gemology, there is no such thing as a pink emerald. This is due to the fact that the color definition of emerald is restricted to colors ranging from green to bluish green.

However, the mineral species of emeralds, beryl, can come in a variety of colors like red, blue, yellow, colorless, and pink. This because pure beryl (Be3Al2Si6O8)is colorless. You only get colors seen in emeralds and aquamarines from trace amounts of other elements like iron, chromium, manganese, and vanadium. The pink variety is specifically called morganite, after the famous American banker and collector extraordinaire, J. P. Morgan. Morgan’s mineral collection was so impressive and extensive that it still makes up a significant portion of the best mineral specimens in the Museum of Natural History in New York today.

Emerald Color Range

E1001 | small | center

Emerald ID: E1001 – Weight: 1.55 Carats – Origin: Zambia

E167 | small | center

Emerald ID: E167 – Weight: 1.01 Carats – Origin: Zambia

E1096 | small | center

Emerald ID: E1096 – Weight: 1.05 Carats – Origin: Zambia

Color


Not an Emerald – Morganite

While morganite comes in a dizzying array of pinks, it does not typically have high color saturation and often looks washed out. Even highly saturated larger pieces at auction at Sotheby’s are a pastel pink instead of a more vivid color. Experts will tell you that the best examples of this gem come from Madagascar, though exceptional pieces from other locations like Brazil are very possible (if improbable).

Color Chemistry

Like red beryl, morganite is colored by a rare element called manganese. Thankfully only small amounts of manganese are needed to reach a pink color. Precise values are not given because the exact amount of manganese that is present in each crystal varies. The color is not always evenly distributed either, and can show color-zoning. Note that the more trace elements are present, the more vivid the color is.

Trace Elements – Manganese in morganite is a trace element because it only accounts for a fraction of a percent of the crystal structure. Elements that are not a core component of the crystal are dubbed as trace elements in those gems. In the mineral beryl the necessary components are beryllium, aluminum, silicon, and oxygen. 

Aside from the specifics of what elements color morganite, what is written here also applies to most if not all gems colored by trace elements (including emeralds).

Carat Weight

Unlike red beryl that only grows to a fraction of a carat (around 0.2 carats), morganite can reach sizes of 100s of carats. Despite the large carat weight, finding deeply saturated pieces is a problem. Abundance of carat weight does mean that gem cutters are more likely to give the gem an ideal cut.

Price

While not an impossible gem to find, bright vivid colors are not common in morganite. They are typically light, and a little desaturated. High-end pieces of morganite also end up in auction houses like Sotheby’s for tens of thousands of dollars. 

Mineral specimens that show ideal crystal formation based on their habit, or ideal shape can be valuable too. If it was the piece that came from Morgan’s high-profile collection, then it would be the namesake specimen of the color.

Clarity Types

Despite being the same species, morganite and emeralds actually have different clarity types. This refers to how clear or included a gem normally forms. Type I gems are frequently eye clean, meaning they have no visible inclusions like morganite and aquamarines. Type II gems usually have some inclusions visible, which is what type of gem morganite is. Incidentally, most crystals are Type II gems. Type III gems are expected to show visible inclusions. Emeralds are an example, with less than 1% of all emeralds being eye-clean.

Type I – Eye-Clean


Aquamarine

Type II – Somewhat Included


Ruby ID: R12008

Type III – Near Always Included


Emerald ID: E1373

Sources

Morganite mainly comes from two sources, Brazil and Madagascar. Aside from morganite, Brazil also produces aquamarines, heliodor, and most notably fine-quality emeralds. The country is a huge producer of beryl varieties in general. However, Madagascar morganite is considered to be the standard when it comes to top-quality gem material.


Brazil circled left, Madagascar circled right

There are other sources for morganite, with specimens in the collection of the Museum of Natural history also coming from California, USA. The reasons these sources do not get mentioned is because they do not consistently produce the gems the way Brazil and Madagascar do.

Phenomena

Morganite can possibly show a cat’s eye, with the phenomena formally called asterism, though this is very rare. The eye will most likely be soft and fuzzy, and the gem color will probably be weak too. Most gem cutters working with morganite are not looking for this feature either, though a professional always takes note of potential features their gems can show.

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