Chromium
Chromium is a hard metal that is typically used as a coating of costume jewelry.
Chrysoberyl
Chrysoberyl is a relatively rare mineral that varies in color from gray, green, yellow, or brown and is used as a gemstone.
Chromium
Chromium is a lustrous, hard brittle, steel-blue metallic element which is highly resistant to corrosion and tarnishing. It is generally used in the hardening of steel alloys and the production of stainless steels.
Cleaning ...
CHROMIUM
Chromium is a hard, shiny, gray-white metal. This metal resists corrosion very well and is used in costume jewelry as a coating over other metals.
CHRYSOBERYL ...
CHROME (Chromium): The word comes from the Greek "chroma," which means color. Chrome is a metal that forms very hard steel-gray masses that gleam a silver color. Less than 3% mixture of chromium to steel produces and extremely hard alloy.
Chromium plating replaced expensive brass fittings, at first only on the more conspicuous parts of the pram, but after World War 2 every exposed piece of metal was chromed, in common with the motor cars of the day.
The chromium atoms are in oxidation state +6 in both, and the chromate and dichromate ions are fairly strong oxidizing agents. Chromium in the +6 (or VI) oxidation state is often referred to as hexavalent chromium.
Heated chromium-bearing pinkish-brown to orange stones
Normal
Irradiated to produce a green color
Diffusion of color at or near the surface ...
Due to chromium, this material produces tones that are predominantly green with subtle blue overtones in contrast to the more familiar royal violet/blue tones, derived from vanadium.
Fuschite is a chromium mica, it has a brilliant green color and comes from the same family as lepidolite (aluminium silicates) but where lepidolite contains lithium, fuschite contains chromium.
Green rouge is chromium dioxide, which is used to polish precious metals, giving them a luster.
GREENSTONE ...
[Beryl: emerald (chromium or vanadium); corundum: sapphire (titanium and iron); quartz: carnelian (iron); garnet: Spessartite (manganese)] ...
Just as sulfur and chromium form the anion groups (SO4)2- and (CrO4)2-, the ions of molybdenum (Mo) and tungsten (W) bond with oxygen atoms to create the anion groups (MoO4)2- and (WO4)2-.
A steel containing chromium with good deep-drawing properties used for the manufacture of domestic sinks. It is magnetic, unlike true stainless steel.
Stainless steel ...
Aluminum oxide with chromium and the chemical formula is Al2O3,Cr.
Colours
All shades of red with hue of blue, brown, yellow and orange.
Emeralds are a very hard, green precious stone (beryl, Be3Al2Si6O18, colored by chromium and some vanadium impurities).
The blue color is caused by copper, while the green color is caused by iron or chromium.
Chalcosiderite, a stone known for its green coloring, has the exact same structure as turquoise but a slightly altered composition.
Chromium would come from a smidgen of fuchsite or mariposite.
Cobalt is an impurity in several different sulfide minerals, although you'd have to watch for arsenic too.
The verdant green color is due to traces of chromium and vanadium in the beryl crystals. The ideal color is a deep uniform green with no or few inclusions. Emerald inclusions are known as jardins (gardens).
Emeralds are created when chromium combines with various impurities. Unlike most gemstones, inclusions, (called "jardin," the French word for garden), are quite common in emeralds, ...
The "green" of emerald is created from a combination of different wavelengths that can help distinguish a "chromium" colored natural emerald from other types of green gemstones, ...
The change in color is caused by trace amounts of chromium and vanadium. The amounts of these minor trace elements in the chrysoberyl lattice may vary depending on geographical location.
The impurities in the beryl structure namely chromium and vanadium give an emerald its divine green color. Some believe that the chromium impurity defines emerald, whereas beryl colored with vanadium is merely green beryl.
Medium to dark green beryl which derives its color from chromium (some gemologists argue that dark green beryl colored by vanadium should be called emerald, and others insist that chromium must be present).
Ruby is a member of the corundum family whose color comes from chromium oxide in the stone. Although corundum can come in many colors, rubies are, by definition, red.
It is colored red by trace amounts of the element chromium. This small amount of impurity gives the stone its color. The well-known blue sapphire is colored by the presence of the elements titanium and iron.
Traces of chromium and vanadium in the crystalline structure produce the green color. Emerald has been treasured since 4000 B.C., when it was traded in early gem markets of Babylon. Egyptian emerald mines were worked as early as 2000 B.C.
Sapphire belongs to the same aluminium oxide mineral family (Corundum) as Ruby, but Sapphire is far more abundant stone due to the larger occurrence of its chromium, iron, and titanium coloring agents.
is "contaminated" with chromium,
and sapphires are colored by
the presence of titanium and iron
along with the chromium.
This can result in a virtual rainbow of colors -
pink, golden yellow, purple, green -
and the most valuable cornflower blue color.
In composition, emeralds are green beryl, tinted by chromium. The incomparable flare of green fire coupled with the rarity of the stone make the emerald one of the most valued and valuable of gems. Emeralds rate at 7.
Overview: Trace amounts of chromium gives Ruby its bright red color . Ruby is a term for red gemstones derived from the mineral corundum, formed primarily from aluminum oxide.A Ruby is actually a Sapphire of red color.
Chrome is a special variety of green tourmaline that owes its vivid green hue to trace amounts of chromium and vanadium. These are the same elements that also impart to emerald and tsavorite garnet their distinctive pure green hues.
A chromium mica, it gives aventurine its color. In conjunction with other crystals, fuschsite helps to speed up physical or emotional healing. It can return one to a state of wellbeing after an emotional confrontation.
The first number is the amount of chromium that is contained in the stainless, i.e., 18 is 18% chromium. The second number is the amount of nickel, i.e., 8 stands for 8% nickel.
Colored by chromium, while there is little historical information regarding this rare gem, some claim it is beneficial for health, relationships, spirituality and financial success.
In the case of the emerald, it is mainly traces of chromium and vanadium which are responsible for the fascinating colour.
He was soon to leave biology for the field of inorganic chemistry, where his early work was on the oxides of iron-group metals and chromium and a study of the chromous salts.
The chemical name of emerald is Beryllium aluminum silicate and the presence of chromium with it gives it its famous greenish hue. (Be3Al2(SiO3)6) is the chemical formula of emerald.
Rubies derive their colour from chromium present in the corundum. The colour of the ruby will be more intense as the amount of chromium in the corundum increases.
Spinel owns his color to chromium, for the red to orange stones, to manganese for the violet and to iron for the blue variety.
The emerald green color comes from vanadium and chromium. Tsavorite is similar to emerald, but is rarer and more durable; it also has a higher refractive index, 1.74. Tsavorite stones over two carats are considered large and are very rare.
A glass which contains ultra-thin layers of aluminum, chromium, silicon, zirconium or the metal alloy titanium. The colors are almost holographic in appearance. Addition of the various elements is what produces the bold and dramatic colors.
Kashmir sapphire contains little or no chromium, which appears to be one cause of the multicolor effect.
Emerald's precious green color is caused by small amounts of chromium and some vanadium impurities, and enhanced by traces of iron. Unlike other beryls, emeralds often contain inclusions and other flaws called jardin.
An important series of gemstones, Emerald is one of the most expensive stones on the market, the best comes from Columbia and is colored by chromium impurities.
Chrome Tourmaline is colored by chromium resulting in a beautiful green stone that is often confused with emerald or the tsavorite garnet. Indicolite is a dark blueish black stone.
The shades of green are caused by the presence of chromium and vanadium in the mineral ...
This absorption of light is brought about by trace elements - also called transition elements, of which the most important and the commonest are iron, chromium, copper, nickel and vanadium.
Appearance
Colored by chromium, red spinel has been, and is easily confused with ruby. Many of the world's famous "rubies" have turned out later to be red spinel.
Enhancements
Red Spinel is not enhanced.
Emeralds are made of the base mineral beryl, with minute traces of chromium and vanadium giving this gemstone the "green fire". Today, most emeralds are mined in Colombia, Brazil and Zambia.
Emeralds are created when the element Chromium combines with various impurities. Although emeralds are one of the most valued precious stones, they are found commonly with flaws called "jardin," the French word for garden.
Fuchsite, a chromium mica, produces a greenish spangled effect (the most commonly encountered kind); mica, a silvery brassy or golden glitter: and hematite or goethite, reddish metallic reflections.
Stainless Steel
Steel containing chromium and is resistant to rust and corrosion.
Sterling Silver
Silver that is at least 92.5 percent pure with 7.5 parts of another metal, usually copper, to make the piece harder.
emerald - a variety of beryl with a green color caused by chromium or vanadium. There are some foreign gemologists that will only call a stone an emerald if the stone is colored by chromium.
This challenging landscape is home to the world's major deposit of chrome diopside, a diopside gem variety that is colored by chromium, the important element that also gives emerald its rich green color.
Stainless Steel
Steel that contains chromium and is resistant to rust and corrosion.
Step Cut
A gem cut with a varying number of sloping parallel rows of four-sided facets, giving the impression of steps.
Industrial / ecomonic uses:
Only ore mineral for chromium.
Inaccurate data? Better photos? .
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Thus cobalt gives a blue color, copper or chromium green, copper or gold give red (under proper treatment) and manganese gives purple. By experiment the makers of pastes have become very skillful in imitating the color of almost any precious stone.
The name is an allusion to the chromium content responsible for the color. Another gemstone prized by collectors is black star diopside. This phenomenal variety exhibits four rays, each of which is bent, giving it a distinctive look.
Electroplating - Coating a metal surface (in fashion jewelry, usually with copper, nickel, chromium, gold, siler or rhodium) by means of electrolysis. The amount of electroplate on an object is measured in microns (one micron = .001 mm).
It is available in a chromium-rich gem variety and is called as chrome diopside in bright color. The stone is relatively soft. It is also common to many high-temperature assemblages of the calcium-silicate units.
 See also: Stone, Color, Gemstone, Jewel, Crystal
  
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