Oxide
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Oxide Minerals
A diverse group with simple formulas.
Phosphate Minerals
Minerals that include this important element.
Oxide: A compound containing one oxygen atom per molecule. See also dioxide.
Oxidize: The act of combining with oxygen to make an oxide.Oxidized metal is rusted.
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.
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.
oxide - formed when the molecules of a metal combine with oxygen from the surrounding air. The result is a darkening of the metal.
Oxides: This group will have one or more oxygen atoms (not grouped with silicon, phosphorus or carbon) in their formulas. Many oxides are important ores of metals or valuable gemstones and tend to be quite hard and rather dense.
OxideChromite
FeCr2O4
Most distinguishing features:
Resembles magnetite and ilmenite, but not very magnetic and has a more resinous lustre.
An oxide mineral of Iron, relatively hard and heavy. Hematite enhances personal magnetism, will and courage. Hematite is believed to be beneficial for blood flow, stress and the nerves.
Jade ...
1.5.4. Oxides. The oxide minerals contain various cations (not associated with a polyanion) and oxygen. Examples are hematite (Fe2O3) and magnetite (Fe3O4).
Metallic oxides are responsible for imparting color to this mineral. If not for these impurities present in the crystal structure of corundum, it would be colorless.
SnO2 Tin Oxide
Color(s):
brown to black, rarely reddish, yellow, gray, colorless ...
Iron(III) oxide in its mineral form is known as hematite. Apart from its qualities as a metal hematite is also used in jewelries. The usage of this mineral for making ornaments is nothing unique.
Zirconium Oxide, or more accurately Zirconium Dioxide, also called zirconia, when crystallised in cubic system, it is known as Cubic Zirconia, the most successful imitation diamond.
Chlorine Dioxide, ClO2 from SafeOx
Chlorine Dioxide, ClO2. SafeOx are chlorine dioxide specialists offering several alternative ClO2 delivery methods suitable for most small, mid-sized and large scale industrial and commercial applications.
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.
hydrous iron oxides for red- to orange-brown,
an iron compound (iron-rich clay?) for some dark green streaks
graphite for some gray-to-black jadeite jades.
2. Use cerium oxide as a polish, and use it with oatmeal. Let it go for several weeks. Do NOT add water in this method. Polish dry.
3. Use a vibrating polisher. These type polishers do not have the harsh action a rotary polisher has.
Ruby (Aluminum Oxide, AL2 O3) is the red variety of the mineral corundum with a hardness of 9 on Mohs scale. Corundum is the hardest of all minerals only next to diamond, which has a hardness of 10 on Mohs scale.
A mineral (iron oxide) that has a dark steel grey color and a high luster. Hematite is a popular component of fashion jewelry and has a hardness of 5 ½ to 6 ½ on the mohs scale.
Hopi overlay ...
Members of the oxide class are minerals in which an oxygen anion is combined with one or more metals.
Cassiterite (tin-oxide)
The tin used in bronze alloy is a byproduct of the mineral cassiterite (above, right) which is a tin-oxide mineral that contains around 5 percent tin, making tin a relatively rare commodity.
Quartz (silicon dioxide,SiO2) is the most common mineral on Earth. It is found in nearly every geological environment and is at least a component of almost every rock type. It is also the most varied in terms of varieties, colors and forms.
Quartz: Silicon dioxide, one of the commonest of all minerals. It crystallizes in a the hexagonal system.
R
Rectifier: a device that changes alternating current to direct current.
beryllium aluminum oxide, Group of minerals including Alexandrite and Chrysoberyl cat's eye.
Chrysoberyl Cat's Eye
Greek meaning waving light.
Quartz is silicon dioxide, SiO2, the second most common mineral in the crust of the earth (less common than feldspar).
Corundum is a sesquioxide of aluminum, with the percentages, alumina 53.2, oxygen 46.8. Its hardness is 9 in the scale, and no mineral except the diamond equals it in this respect.
"A bed (of magnetic oxide of iron) was opened many years ago on Anthony's Nose Mountain, but it contained much pyrites and crystallized phosphate of lime, both of which injure the ore for the manufacture of iron." ...
titanium oxide
crystallography: tetragonal
Colors: blue, light yellow to brown
Luster: adamantine to submetallic
Hardness: 5.5 to 6
S.G.: 3.8 to 3.9
Cleavage: perfect basal
Fracture: subconchoidal ...
Cubic Zirconia is formed in the lab from zirconium dioxide and is hard, flawless, generally colorless, and inexpensive alternatives to diamonds. Culet:A small facet at the bottom of some cut gemstones.
silica group Group of silicate minerals (tectosilicates) composed only of silica (silicon dioxide -- SiO2 ).
A common mineral composed of iron oxide. Often grey or silver grey, Hematite takes a nice mirror polish and makes attractive cabochons and beads.
Howlite
A white or grey mineral composed of Calcium Boro-silicate Hydroxide.
Its various shades of red are due to the presence of iron oxide. Stones may be uniformly colored or faintly banded. The best carnelian is from India, where it is placed in the sun to change brown tints to red.
Silver tarnishes after exposure to air (a thin layer of silver-oxide forms on the surface). Silver often occurs near copper lodes.
- SPINEY OYSTER
Spiney Oyster, Spondylus Brodnip Princess is found in the Sea of Cortez, Baja California, Mexico.
Sapphire is the non-red variety of corundum (an aluminum oxide mineral): ruby is the red variety. In essence, ruby is really a red sapphire, since ruby and sapphire are identical in all properties except color.
Jewelers treat soldered objects with dilute acid solutions to remove oxides produced from heating and soldering as well as glassy flux residues. This process is called pickling.
The artificial diamonds are formed by various techniques, the cubic zirconium is one in which the cubic crystalline form of zirconium dioxide is used to create an artificial diamond.
Hematite or haematite: Grey-blackish mineral composed of iron oxide. Commonly machined into balls for captured bead rings.
The mineral baddeleyite has the same chemical composition, but to become a CZ the mineral must be heated to almost 5000 degrees Fahrenheit and have an oxide stabilizer such as yttrium or calcium added to keep it from reverting back to its original ...
Early experiments had used cobalt oxide, but the colour concentrated in patches, so magnesium oxide was added as a flux; this resulted in a stone that was a synthetic spinel rather than a synthetic sapphire.
Ruby, this magnificent red variety from the multi-coloured corundum family, consists of aluminium oxide and chrome as well as very fine traces of other elements - depending on which deposit it was from.
The red colour of ruby results from a small admixture of chromic oxide. The most prized tint is blood red or crimson known in the trade as "pigeon's blood" red.
Those who are familiar with glass making may receive some help at this point by remembering that the various glasses are silicates, for they are made by melting sand (which is nearly pure oxide of silicon) with various metallic oxides.
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.
Almost all the cubic zirconia in the market today is chemically comprised of zirconium oxide and yttrium oxide.
This dark silvery-charcoal, almost metallic-looking mineral is an iron oxide. Nearly all commercially available Hematite beads are a simulated material virtually identical to real Hematite.
This is glass which has been coated on one side with metal oxide layers. These oxides are vaporized and deposited on the glass surface in a vacuum chamber, by heating the metal oxides between 1,000 & 2,500 degrees Celsius.
The neodymium oxide may be either in the glass itself or a coating sprayed onto the inside of the light bulb glass. Light bulbs made with neodymium glass have a purplish color.
Swarovski crystals, like most other crystals, contain lead oxide. Lead creates the refraction of the crystal with the maximum refraction at 30-32% lead content. Lead also adds to the weight of the crystal giving it a more substantial feel.
Powdered aluminum oxide travels towards a flame. The 2000 degree heat is created by that flame melts the powder and droplets are formed. These droplets then drop onto a slowly turning earthen rod and, upon cooling, crystallize in to a boule.
PASTE: A superior glass containing oxide of lead used for jewelry to imitate gems and gemstones. Much paste is actually a composition of pounded rock crystal melted with alkaline salts and colored with metallic oxides.
Enameling: A decorative technique in which a vitreous pigment of metallic oxide is mixed with finely powdered glass is applied to the surface of a metal--normally bronze, copper, silver or gold.
Titanium's compounds are particularly valuable in the making of fine jewelry: pure crystalline titanium dioxide (titania) is used as a gemstone. Titanium dioxide is also responsible for the star effect in certain sapphires and rubies.
An Almandine in which the Ferrous Oxide is replaced partly by Magnesia is found at Luisenfeld in German East Africa. In the United Statesthere are many localities which yield Almandine.
Pure oxides of aluminum (in the cases of ruby, sapphire, and spinel) or titanium (rutile and strontium titanate) are poured into the top of a small furnace and melted.
The Romans made red glass by adding copper oxide to their mix, and in the Middle Ages manganese was used to produce a pale red. In 1680 a German glassmaker discovered how to produce ruby-coloured glass with a consistent colour by using gold chloride.
Ruby is the gem quality form of the mineral corundum, and one of the most durable minerals which exists, a crystalline form of aluminum oxide. Corundum has a hardness of 9 on the Mohs scale and is also extremely tough.
Lead crystal is high-quality glass containing at least 10% lead oxide. Glass containing at least 24% lead oxide is called lead crystal. Glass containing at least 30% lead oxide is called full lead crystal.
The colour of a sapphire is borne from trace minerals, such as iron, chrome or metallic oxides, present in the corundum. These minerals are known as "impurities" in the corundum, but their significance is almost exactly the opposite.
Diffusion-treated stones are already-cut stones that are heated in the presence of other compounds (like iron oxide, chromium oxide, titanium dioxide, etc.) that will infuse the extreme outer surface stone with color.
 See also: Stone, Color, Mineral, Crystal, Gemstone
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