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.
oxygen - A colorless, odorless gaseous element, 0. Used with a fuel gas such as hydrogen, acetylene, propane, methane or coal gas to produce intense heat. A torch is used to combine the gases to generate heat for soldering, welding and melting of metals.
An oxygen atom has two electrons in its outermost shell that are available to bond with the silicon atom. If four oxygen atoms surround one silicon atom, where each oxygen atom offers one electron, then the silicon atom's outermost shell will be complete and stable.
C10H16O (oxygenated hydrocarbon)
The movie Jurassic Park popularized the myth that someday we may be able to extract DNA from the entombed insects within, but entomologists George and Roberta Poinar have been studying samples of Baltic and Dominican amber for over two decades, ...
Advent of bottled ~ (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'
This process causes a controlled oxidation of the metal's surface to occur (~ atoms bond to surface atoms of the metal). Aluminum is often anodized, as is magnesium, titanium, and tantalum. Anodized metal has a lustrous sheen; the anodizing process can produce colorful surfaces.
The minerals of the oxide class are those which contain ~ bonded to one or more metallic elements. Hydroxides are compounds of a metallic element and water or the hydroxyl anion (OH)-. The oxide minerals tend to be relatively hard, and some of them may be used as gemstones.
Heating a gem in the presence of ~ can activate such color centers in corundum. Virtually any light-colored Sri Lankan sapphire can be heated to produce a yellow to golden color in an oxidizing atmosphere because these stones naturally possess the Mg2+ needed.
Bloodstone is said to strengthen and ~ate the bloodstream, enhancing physical and mental vitality. It will strengthen the heart, spleen and bone marrow and aids in balancing iron deficiencies. It is a powerful physical healer and reduces emotional/mental stress.
The local gem traders had learned to heat the brown zircons in an ~ 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. Many brownish Zircons from other locations can also be heat treated.
Since it a refractory in nature it can reacts with ~ producing changes on the metal's surface .When a electric current is passed through the surface it forces ~ to produce thick oxide layer and diffused white light produces stunning colors.
Silicates - Mineral containing silicon and ~, along with other elements.
Skarn - A contact metamorphic rock, often containing well-formed crystals of silicate and other minerals.
Skeletal - Crystal habit showing hollowed out faces caused by uneven growth. (Halite) ...
Amethyst is found in cavities of rock where molten materials rich in silicon and ~ 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 ~ in the atmosphere as are other metals. This is why gold does not tarnish -- tarnish is the result of metal reacting with ~ in a process called oxidation.
A "reducing" atmosphere (one without ~) 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). In an "oxidizing" atmosphere (~ present) the number goes up.
Carbon dioxide, ~ 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. Because of this, very little ironwork (compared with bronze, for example) has survived from ancient times in good condition.
Tungsten Carbide is created by firing tungsten with carbon powder in an ~-free oven at 6,200oF. This process is called sintering, and it creates the hardest metal used in making jewelry. Like titanium, tungsten carbide is tough and rugged, perfect for a man's active lifestyle.
Most lampwork artists use a bead making torch that burns either propane or natural gas for the fuel, surface mixed with air or pure ~ (either from a tank or a lampwork ~ concentrator) as the oxidiser. This creates a cleaner and quieter flame.
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 ~.
A compound of two parts aluminum and three parts ~ which occurs naturally as corundum. Alumina is the base of aluminous salts, a constituent of feldspars, micas, etc.
Formed from the two most abundant elements in the earth's crust: silicon and ~. Quartz has a high thermo-conductivity, which makes it feel cool to the touch. Historical records show the use of quartz crystal for decoration and jewelry for at least the past 4,000 years.
Oxidation is a chemical process in which ~ 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).
For an instance, a crystal of quartz is in hexagonal shape because of the manner the atoms of silicon and ~ combine together. Generally, there are 2,000 minerals have been discovered. ~ is a component of several minerals. Minerals composing ~ made up almost half of the earth's crust.
Overview: Magnesite is composed of magnesium, carbon, and ~ (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 ~, zircon contains small quantities of rare earths and radioactive elements such as thorium and uranium. These inclusions give zircon differents hardnesses and properties.
On the mental/emotional levels, when sufficient ~ is going to the brain (which requires large amounts) we feel alert, energized, clear, able to concentrate, and emotionally balanced.
All these metals require ~ to be mixed with the fuel when melting since they have such a high melting point. They resist tarnishing and do not require flux when soldering. Metals in this group can also be cast, but because of their high melting point, a special investment must be used.
Silica is a very common mineral composed of silicon and ~ (SiO2). Silicates make up about 95% of the Earth's crust.
Silicates are minerals composed of silicon and ~ with one or more other elements. Silicates make up about 95% of the Earth's crust.
The metals are fused together in an ~ free furnace at very high temperatures. Even at such high temperatures, the tungsten itself does not melt to mix with the other metals.
Oxidation - Chemical process to blacken or tarnish. Slphur and ~ is used on silver.
Oxide - A compound containing one ~ atom per molecule.
Oxidize - The act of combining with ~ molecules to make an oxide. Oxidized metal is rusted.
The resulting boules are opaque black, but when reheated in a stream of ~ they change to various colours.
Copper that has had deoxidiser added to reduce ~. Phosphorus is commonly added but other elements such as boron or magnesium may be used.
Selective corrosion of the beta phase of duplex brass that leaves a copper residue under a 'meringue' of zinc oxide.
They may be single chains, so that of the four ~ coordinating the Si atom, two are shared with adjacent tetrahedra to form an infinite chain with formula (SiO3)2-. The single chain silicates include the pyroxene and pyroxenoid minerals which are common constituents of igneous rocks.
Mother-of-pearl primarily consists of calcium carbonate, a molecule which contains calcium, carbon, and ~.
Corundum is a gem mineral composed of gas ~ and light metal aluminum. The two most valuable corundum include Ruby and Sapphire. Due to its hardness, brilliance and variety, some experts consider corundum to be the most important and most versatile of the gem families.
Metal blackened by a reaction with ~. The appearance is accomplished by chemical means.
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 ~ therapy; smoke inhalation.
Fire Agate: Master healer with color therapy; enhances all essences; grounds and balances; sexual & heart chakra binder; burns energy.
For example, corundum's chemical composition is represented by the formula Al203, which means it's essentially made of aluminum (AI) and ~ (0), with two aluminum atoms for every three ~ atoms. The combination of chemical composition and crystal structure defines a mineral species.
It increases the flow of ~ 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 ~. Ruby and sapphire are the most valuable corundum.
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-~ Irish and Scotish peat-bogs for thousands of years. Bog-oak was carved and used as inexpensive Victorian era jewelry.
Exposure to ~ 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. Silver is also used to make coins and bullion.
OXIDE. The product of the combination of ~ 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 ~ (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, ~ and yttrium, which was discovered in 1937. It lacks the silicon of a true zircon, and is, of course, very much younger.
Oxidation is a chemical process in which a metal is blackened as a reaction to ~.
Palladium is a member of the Platinum group metal and it is lighter and less expensive than platinum. Palladium is usually mixed with yellow gold to create white gold.
The overwhelming majority of our substance consists of carbon and the three gases ~, nitrogen and hydrogen. Everything else, about a dozen different elements, is "minerals." So-called major minerals are needed every day in significant amounts"humans need quantities on the order of a gram.
Chemical composition -- A compound of sodium, calcium, aluminum, silicon, ~, and sulfur, usually found as a rock mixture of lazurite, calcite, and pyrite.
Color --Blue to violet-blue.
Optics -- R.I. 1.50.
Corundum (that’s aluminum and ~ to you and me) is second only to diamond in hardness, and sapphires are the natal stone for the month of September. Sapphires are found in over 20 countries around the world, including the United States. But the finest blue sapphires are from Kashmir.
The use of anti-bacterial ointments is generally discouraged as they may block ~ from the piercing as well as providing a place for stronger contaminants to breed. Alcohol and witch hazel are also considered ineffective cleaning agents.
reducing flame - a torch flame that has an excess of flammable gas (fuel) in proportion to the ~.
refining - the process of purifying metal.
rolling - the process of changing the thickness of metal sheet by passing it between hardened steel rollers under great pressure.
Oxidize: The metal surface, typically silver, is caused to combine with ~ to create a darkening of the metal--the same as tarnishing, except it is limited to only the desired area to be darkened.
Oxidation - the process where a metal (often silver) blackens or tarnishes as a reaction to ~ and sulphur. Also sometimes called a patina.
Pampilles - jewelry with a cascade of pendant stones. Very popular in Georgian jewelry. It was meant to look like rain drops.
The weight of an atom compared to the weight of an atom of ~,16.
The weight system of most English speaking counties. 16 ounces to the pound avoirdupois.
Compounds & Effects - Acetylene
High concentrations of acetylene and carbon dioxide become asphyxiating by preventing normal supply of ~ to the lungs. Acetylene also contains toxic impurities. Highly flammable and explosive.
Jewelry Frequently Asked Questions ...
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 ~.
Oxidation: The forming of an oxide, as the copper in sterling silver or a karat gold alloy combining, through heat, with ~ and forming a copper oxide.
Pennyweight: A unit of Troy weight, used for weighing precious metals.
OXIDATION A film or coating that forms, like a skin on the exterior of metal resulting from a reaction with ~. Antiquing is a chemical process used to create an oxidized look.
Oxidation: The breakdown of a metal over time as a result of exposure to ~ and other natural elements.
Circulates ~ throughout the body. Benefits bronchitis. ď Vibrates to the number 9. Hicorite (Moukaite) - see Jasper Is a trade name given to Moukaite (Jasper) - Pink to light red, cloudy.
Firescale - Also known as "firestain," a red or purple discoloration that appears at high temperatures when ~ mixes with the copper to form cuprous oxide, and then cupric oxide.
Most rocks at the Earth's surface are formed from only eight elements (~, silicon, aluminum, iron, magnesium, calcium, potassium, and sodium), but these elements are combined in a number of ways to make rocks that are very different.
Occurs both in crystalline and massive form
Found in Bolivia, Brazil, and India
Metaphysical/ Medical Properties: Stimulates the intellect. Aides in quickening ~ation of the body. It is also used to stabilize the RNA/DNA structuring within the body.
Originally from the Middle Ages, the term lampwork referred to oil lamps with a blowpipe directed into the flame to increase the heat generated. Today, modern torches use propane, natural gas, or hydrogen mixed with compressed air or pure ~ to generate the intense heat required.
before cleaning, going to pools or hot tubs, painting, moving heavy furniture, doing sports so that you don't brake it or get it dirty. Also, when you are not wearing your jewelry store it in a ziploc type of bag, the reason for that is that sterling silver oxidizes in contact with ~ which ...
Diamond-like substitutes, including "cubic zirconia," a crystalline compound synthesized from the elements ziconium and ~, attempt to mimic this light-dispersing property, though they fall short of diamond's brilliance and unrivaled hardness.
See also: What is the meaning of Mineral, Rough, Color, Crystal, Natural?