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Nascent Drama

The large number of green pigments makes it impossible to mention them all.
 
Among the more famous green minerals, however is the emerald, which is colored green by trace amounts of chromium and sometimes vanadium.[15]
 
Chromium(III) oxide (Cr2O3), is called chrome green, also called viridian or institutional green when used as a pigment.[16]
 
For many years, the source of amazonite's color was a mystery.
 
Naturally, many people assumed the color was due to copper because copper compounds often have blue and green colors.
 
More recent studies suggest that the blue-green color results from small quantities of lead and water in the feldspar.[17]
 
Copper is also the source of the green color in malachite pigments, chemically known as basic copper(II) carbonate.[18]
 
Early painters would also use copper in the form of verdigris mixed with wax and turpentine to create green pigmentation in paints.[19]
 
Mixtures of oxidized cobalt and zinc were also used to create green paints as early as the 18th century.[20]
 
A more complete list of green minerals and pigments can be seen here.
 
There is no natural source for green food colorings which has been approved by the US Food and Drug Administration. Chlorophyll, the E numbers E140 and E141, is the most common green chemical found in nature, and only allowed in certain medicines and cosmetic materials.[21]
 
Quinoline Yellow (E104) is a commonly used coloring in the United Kingdom but is banned in Australia, Japan, Norway and the United States.[22]
 
Green S (E142) is prohibited in many countries, for it is known to cause hyperactivity, asthma, urticaria, and insomnia.[23]
 
To create green sparks, fireworks use barium salts, such as barium chlorate, barium nitrate crystals, or barium chloride, also used for green fireplace logs.[24]
 
Copper salts typically burn blue, but cupric chloride (also known as "campfire blue") can also produce green flames.[24]
 
Green pyrotechnic flares can use a mix ratio 75:25 of boron and potassium nitrate.[24]
 
Smoke can be turned green by a mixture: solvent yellow 33, solvent green 3, lactose, magnesium carbonate plus sodium carbonate added to potassium chlorate.[24]
 
Green is common in nature, especially in plants.
 
Many plants are green mainly because of a complex chemical known as chlorophyll which is involved in photosynthesis.[9]
 
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