Search results
Results from the WOW.Com Content Network
As a green pigment it is also known as Mitis green, Schweinfurt green, Sattler green, emerald, Vienna green, Emperor green or Mountain green. It is a highly toxic emerald-green crystalline powder [4] that has been used as a rodenticide and insecticide, [5] and also as a pigment. It was manufactured in 1814 to be a pigment to make a vibrant ...
Emerald Green, also known as Paris Green, Scheele's Green, Schweinfurt green and Vienna Green, is a synthetic inorganic compound, made by a reaction of sodium arsenite with copper(II) acetate. While it makes a beautiful rich green, the color of the emerald stone, it is highly toxic , due to a main ingredient, arsenic . [ 17 ]
Scheele's green was invented in 1775 by Carl Wilhelm Scheele. [2] [3] By the end of the 19th century, it had virtually replaced the older green pigments based on copper carbonate. It is a yellowish-green pigment commonly used during the early to mid-19th century in paints as well as being directly incorporated into a variety of products as a ...
Emerald, also called emerald green, is a tone of green that is particularly light and bright, with a faint bluish cast. The name derives from the typical appearance of the emerald gemstone . [ 39 ] The first recorded use of emerald as a color name in English was in 1598.
Normally, in grading colored gemstones, color is by far the most important criterion. However, in the grading of emeralds, clarity is considered a close second. A fine emerald must possess not only a pure verdant green hue as described below, but also a high degree of transparency to be considered a top gemstone. [8]
That is until between 1930 and 1940, when a teenager working on his parents’ ranch in McLean spotted something emerald green glinting from the ground: It was the ancient blade.
Chromium is a very powerful colorizing agent, yielding dark green [6] or in higher concentrations even black color. Together with tin oxide and arsenic it yields emerald green glass. Chromium aventurine , in which aventurescence is achieved by growth of large parallel chromium(III) oxide plates during cooling, is made from glass with added ...
Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.