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Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3) 6) colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale . [2]
The color defined as green in HTML/CSS color standard is the color called green, low green, or medium green in many of the older eight-bit computer palettes. Another name for this color is green W3C or office green.
Emerald Green. 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.
Paris green (copper (II) acetate triarsenite or copper (II) acetoarsenite) is an arsenic -based organic pigment. As a green pigment it is also known as Mitis green, Schweinfurt green, Sattler green, emerald, or Vienna green, Emperor green or Mountain green. It is a highly toxic emerald-green crystalline powder [4] that has been used as a ...
The Emerald Tablet, the Smaragdine Table, or the Tabula Smaragdina is a compact and cryptic Hermetic text. It was a highly regarded foundational text for many Islamic and European alchemists.
Several minerals have a green color, including the emerald, which is colored green by its chromium content. During post-classical and early modern Europe, green was the color commonly associated with wealth, merchants, bankers, and the gentry, while red was reserved for the nobility.
Viridian is a bright shade of spring green, which places the color between green and teal on the color wheel, or, in paint, a tertiary blue–green color. Viridian is dark in value, has medium saturation, and is transparent .
Teal is a greenish-blue color. Its name comes from that of a bird—the Eurasian teal ( Anas crecca )—which presents a similarly colored stripe on its head. The word is often used colloquially to refer to shades of cyan in general.
Dark green is considered to be the most beautiful, scarce, and valuable color for emeralds. An emerald of this color is considered rare and is only found in the deepest mines of Colombia. [4]
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6 ( P O 4) 4 (O H) 8· 4 H 2 O. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue. A turquoise dome of the Po-i-Kalyan Mosque in ...