Oxygen is the chemical element in the periodic table that has the symbol O and atomic number 8. The element is very common, found not only on Earth but throughout the universe, usually bound with other elements.
Oxygen: A nonmetallic element that is normally a colorless, odorless, tasteless gas that constitutes 28 percent of the Earth's atmosphere. Oxygen combines with many other elements easily.
An oxygen atom has two electrons in its outermost shell that are available to bond with the silicon atom.
C10H16O (oxygenated hydrocarbon)
The movie Jurassic Park popularized the myth that someday we may be able to extract DNA from the entombed insects within, ...
Advent of bottled oxygen (liquefied and compressed)
Successful experiments with chemical manufacture of very small rubies and sapphires in Paris, published by Frémy
Aucoc buys Parisian firm 'Lobjois' and changes it's name to 'La Maison Aucoc' ...
Group of silicate minerals that have each set of tetrahedrons surrounded by three oxygen atoms, forming a sheet like structure. shelly fracture Synonym of conchoidal fracture.
The minerals of the oxide class are those which contain oxygen bonded to one or more metallic elements. Hydroxides are compounds of a metallic element and water or the hydroxyl anion (OH)-.
Heating a gem in the presence of oxygen can activate such color centers in corundum.
Capillary Loops The blood vessels feeding oxygen to the skin, starting in the skin's dermis, looping towards the epithelium and returning into the dermis.
2, oxygen 46.8. Its hardness is 9 in the scale, and no mineral except the diamond equals it in this respect. This hardness gives it a wearing quality as a gem second only to the diamond.
It is silicon oxide, containing the two elements silicon and oxygen. Silicon itself is a dark, gray, crystalline element that seems half metallic, half non-metallic in its properties.
The chromium reacts with the oxygen in the air to form an invisible, protective chrome-oxide surface layer. This layer helps to prevent "staining" (rusting) of the surface. This does not mean that stainless steel will never rust.
The local gem traders had learned to heat the brown zircons in an oxygen free environment to produce dazzling blue stones. To this day, the border area of Thailand and Cambodia remains the largest producer of gem quality zircons.
Since it a refractory in nature it can reacts with oxygen producing changes on the metal's surface .When a electric current is passed through the surface it forces oxygen to produce thick oxide layer and diffused white light produces stunning colors.
Moissan's first researches concerned the interchange of oxygen and carbon dioxide in the leaves of plants.
Just like "Water" is also known as H20, "Oxygen" is also known as O2, and "Hydrochloric Acid" is also known as HCl, "Simulated Diamonds" (or at least by far the most popular form of them) is known as Cubic Zirconia, or CZ.
Silicates - Mineral containing silicon and oxygen, along with other elements.
Skarn - A contact metamorphic rock, often containing well-formed crystals of silicate and other minerals.
Amethyst is found in cavities of rock where molten materials rich in silicon and oxygen from deep inside the earth have surfaced and cooled. The faster molten material cools, the smaller the resulting crystals that form will be.
Gold has no oxides and is not affected by oxygen in the atmosphere as are other metals. This is why gold does not tarnish -- tarnish is the result of metal reacting with oxygen in a process called oxidation.
A "reducing" atmosphere (one without oxygen) which can either be supplied via a high tech furnace, or simply by placing the gems to be treated in a closed container with charcoal), causes the number to go down (+3 to +2 for example).
Carbon dioxide, oxygen and moisture in the air react chemically with the iron to produce the familiar red-brown coating that eventually causes the metal to crumble away.
Tungsten Carbide is created by firing tungsten with carbon powder in an oxygen-free oven at 6,200oF. This process is called sintering, and it creates the hardest metal used in making jewelry.
The topaz is aluminum silicate that gets its color from the inclusion of oxygen, fluorine, hydrogen, silicon or aluminum. It measures an 8 on the Mohs hardness scale, making it one of the harder gemstones, not far behind sapphires and rubies.
Rock crystal quartz, the most common gem variety of quartz crystal, is, like all quartz, formed from the two most abundant elements in the earth's crust: silicon and oxygen.
A compound of two parts aluminum and three parts oxygen which occurs naturally as corundum. Alumina is the base of aluminous salts, a constituent of feldspars, micas, etc.
Oxidation is a chemical process in which oxygen atoms bond to atoms of a material (like a metal) and electrons are transferred from the oxided material to the reduced material. Iron oxidizes when exposed to air and moisture, forming iron oxide (rust).
Overview: Magnesite is composed of magnesium, carbon, and oxygen (MgCO3) and was named after its chemical composition. Magnesite is commonly found in white or gray and sometimes tinted yellow or brown.
In addition to zirconium, silicon and oxygen, zircon contains small quantities of rare earths and radioactive elements such as thorium and uranium. These inclusions give zircon differents hardnesses and properties.
Formed from the two most abundant elements in the earth's crust: silicon and oxygen. Quartz has a high thermo-conductivity, which makes it feel cool to the touch.
On the mental/emotional levels, when sufficient oxygen is going to the brain (which requires large amounts) we feel alert, energized, clear, able to concentrate, and emotionally balanced.
Fire scale is caused when you heat silver or gold and the copper alloy mixes with oxygen in the surrounding air. One way to prevent fire scale is to coat the entire piece you are working on with flux.
Corundum is composed of oxygen and chromium, which produces the red that we see in rubies. Without trace minerals like chromium, these stones would appear colorless.
Oxidation - Chemical process to blacken or tarnish. Slphur and oxygen is used on silver.
Oxide - A compound containing one oxygen atom per molecule.
Oxidize - The act of combining with oxygen molecules to make an oxide. Oxidized metal is rusted.
An element is a substance that consists of the same type of atoms. For example the element oxygen contains only oxygen atoms, whereas the compound water contains atoms of the elements oxygen and hydrogen bonded together.
The resulting boules are opaque black, but when reheated in a stream of oxygen they change to various colours.
They may be single chains, so that of the four oxygen coordinating the Si atom, two are shared with adjacent tetrahedra to form an infinite chain with formula (SiO3)2-.
OXIDIZE:
The process wherein a metal mixes with oxygen and becomes rusted. Platinum and gold do not oxidize. Impurities in any alloys containing gold or platinum may oxidize but the actual metals do not.
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Stainless steel remains "stainless" if it contains at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the ...
Metal becoming tarnished or darkened by exposure to oxygen or by the use of chemicals
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Oxidation - Metal blackened by a reaction with oxygen. The appearance is achieved by a chemical process
Panther link - A flat chain in which solid links are arranged like bricks
Patent leather - Leather with a highly glossy finish ...
Metal blackened by a reaction with oxygen. The appearance is accomplished by chemical means.
pave setting
A setting in which small stones are set as close as possible, so that the piece literally looks "paved" with stones.
Botswana Agate: Use with high-pressure oxygen therapy; smoke inhalation.
Fire Agate: Master healer with color therapy; enhances all essences; grounds and balances; sexual & heart chakra binder; burns energy.
Heat, moisture, oxygen, and most corrosive agents have very little chemical effect on gold, making it well-suited for use in coins and jewelry; conversely, halogens will chemically alter gold, ...
It increases the flow of oxygen to the brain. Learning to relax is the secret of coping with life's ups and downs so it is recommended to join a relaxation class where you can learn to relax doing yoga or you can also opt for the Magnet Therapy.
A gem mineral of crystallized aluminum and oxygen. Ruby and sapphire are the most valuable corundum.
Crimp Bead
Small, soft metal beads that are squeezed shut to secure loops of threading material fasteners onto clasps.
Bog-oak is old oak wood that has been blackened and preserved by being in low-oxygen Irish and Scotish peat-bogs for thousands of years. Bog-oak was carved and used as inexpensive Victorian era jewelry.
Exposure to oxygen or the air causes a black oxidation to form on the surface (silver-oxide), also known as tarnish. Silver is often alloyed with copper to form sterling silver (92.5 percent silver) for use in jewelry.
OXIDE. The product of the combination of oxygen with a metal or metalloid.
PANNING. Primitive process of washing gravel by placer miners in search for gems.
PEARLY. Resembling the sheen of the pearl.
Atomic Weight...Weight of an atom compared with an atom of oxygen (16.00).
Batholith... A huge body of plutonic rock that has been intruded deep into the earth's crust and latter exposed by erosion.
Cubic zirconia is a man-made compound of zirconium, oxygen and yttrium, which was discovered in 1937. It lacks the silicon of a true zircon, and is, of course, very much younger.
Chemical composition -- A compound of sodium, calcium, aluminum, silicon, oxygen, and sulfur, usually found as a rock mixture of lazurite, calcite, and pyrite.
Color --Blue to violet-blue.
Optics -- R.I. 1.50.
Obsolete term for copper containing oxygen at about 0.03-0.07% which gave a level surface free of shrinkage cracks to the top of a casting.
Tungum
Alloyed brass made by Tungum Alloy Co.
The use of anti-bacterial ointments is generally discouraged as they may block oxygen from the piercing as well as providing a place for stronger contaminants to breed. Alcohol and witch hazel are also considered ineffective cleaning agents.
Oxidize: The metal surface, typically silver, is caused to combine with oxygen to create a darkening of the metal--the same as tarnishing, except it is limited to only the desired area to be darkened.
oxidizing flame - a torch flame that contains an excess of oxygen in proportion to the flammable gas (fuel).
P
pavé - small stones set as close together as possible on the surface of metal.
Atomic weight
The weight of an atom compared to the weight of an atom of oxygen,16.
Avoirdupois
The weight system of most English speaking counties. 16 ounces to the pound avoirdupois.
Metal blackened by a reaction with oxygen. The appearance is accomplished by chemical means.
P
Pave setting ...
The rock crystal Quartz, is the most common gem variety of quartz crystal, and is formed from the two most abundant elements in the earth's crust: silicon and oxygen.
The breakdown of a metal over time as a result of exposure to oxygen and other natural elements.
Pave (Pah-vay) ...
TORCH - A tool that disperses heat by using various gases mixed with oxygen. The cleanest torches use natural gas, propane, and hydrogen.
 See also: Crystal, Rough, Color, Metal, Mineral
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