GEMSTONE ENHANCEMENT CODES
N: The "N" symbol appears on the chart only for natural stones which are not currently known to be enhanced; however, the "N" symbol can also be used for other natural gemstones in the event that a gemstone has received no enhancement and the seller will provide a guarantee that there has been none.
E: The "E" symbol indicates that a gemstone has undergone its traditional enhancement process.
The use of heat, light and/or other agents to lighten or remove a gemstone's color.
The use of such surface enhancements as lacquering, enameling, inking, foiling, or sputtering of films to improve appearance, provide color, or add other special effects.
The introduction of coloring matter into a gemstone to give it new color, intensify present color or improve color uniformity.
The filling of surface-breaking cavities or fissures with colorless glass, plastic, solidified borax or similar substances. This process may improve durability, appearance, and/or add weight.
The use of heat to effect desired alteration of color, clarity, and/or phenomena (if residue of foreign substances in open fractures is visible under properly illuminated 10X magnification HF should be used.
|HP Heat & Pressure:
The use of heat and pressure combined to effect desired alterations of color clarity and/or phemonena.
The impregnation of a porous gemstone with a colorless agent (usually plastic) to improve durability and appearance.
The use of a laser and chemicals to reach and alter inclusions in diamonds.
|O Oiling/Resin Infusion:
The filling of surface-breaking fissures with colorless oil, wax, resin, or other colorless substances, except glass or plastic, to improve the gemstones appearance.
The use of neutrons, gamma rays or beta particles (high energy electrons) to alter a gemstones color. The irradiation may be followed by a heating process.
The use of chemicals in conjunction with high temperatures to produce artificial color and/or asterism-producing inclusions.
The impregnation of a colorless wax, paraffin, and oil in porous opaque or translucent gemstones to improve appearance.
Because of the rarity of naturally occurring pearls, a process of cultivating pearls was introduced in the early 1900s. In this process, a small bead of polished shell is inserted into an oyster or mollusk to act as an irritant and produce a pearl, which can take up to 24 months. These pearls are referred to as cultured pearls. Pearls are classically elegant and never go out of style.
Types of pearls
Akoya-These pearls were the first type of pearl to be cultured. Japan and China are the main producers of these pearls. They are consistently round, which makes them perfect for strands. Colors range from white to cream, though some can be gray or black.
Freshwater-The freshwater pearl is usually slightly less round, smaller in size, and possesses less luster than other varieties of saltwater pearls. These pearls are usually cultivated in China and provide a value-priced option.
Mabé-(MAH bay) Instead of growing inside an oyster or mollusk like other pearls, the mabé pearl actually grows against the shell of the oyster, creating a dome-shaped pearl. This pearl is harvested, then assembled. The nucleus is removed and replaced by resin, while mother-of-pearl is used to cover the flat back. Mabés traditionally have high luster and lower prices than round pearls.
South Sea-These pearls are cultured in the northern waters of Australia, Indonesia, and the Philippines. These pearls are considerably larger than akoya pearls and much more sensitive during the cultivation process. South Sea pearls are naturally white, cream, or golden in color.
Tahitian-These pearls are slightly smaller than the South Sea pearl, but are also sensitive during the cultivation process. The colors of black, silver, and gray occur naturally and they are cultured in Tahiti as their name implies.
Download and Print the Ring Sizer (PDF document)
Ring Sizer Instructions:
In order to determine your ring size, we ask you to use the two different ways shown in the document. You may use just one, but we recommend using both in order to cross check the results and minimize the possibility of making a mistake.
First, using the sizer strip you have cut out, place it around the finger on which you wish to wear your ring. Make the numbers face outward and pull the sizer through the slit over the largest part of your finger (possibly your knuckle).
Be sure to pull it tightly for a more accurate sizing. Look at the slit and write down the number that lines up with it.
Second, use your own ring that fits the finger on which you wish to wear your new ring. Place the ring onto the circular sizers. Whichever circle your ring fits most closely with will be your ring size. If it falls in between sizes, go with the larger one.
The number results for both should match. If they do not, we suggest that you use the larger one to insure that you will be able to wear it when you receive it. Please note that your fingers will always measure smallest when it is cold, so you will not want to measure when they are cold.
Urbanowicz Jewelers sells a number of different shaped gemstone jewelry. Some of our most popular shapes include round, marquise, oval, pear, princess, and baguette.
Mozambique, Garnet, Ruby,PinkRhodolite, Garnet, Pink SapphireYellowYellow Sapphire, CitrineGreenBloodstone, Emerald, Jade, PeridotBlueAquamarine, Blue Chalcedony, Blue Spinel, Blue Zircon, Lapis, Blue Sapphire
PurpleAmethyst, TanzaniteWhiteAkoya Pearl, Freshwater Pearl, Mabe Pearl, South Sea Pearl, White Spinel, White Topaz, Moissanite, OpalBrownSmoky QuartzBlack/GrayTahitian Pearl, Onyx
DIAMOND & GEMSTONE SIZE RANGES
Platinum is generally 95% pure and does not tarnish or lose its rich white luster. Platinum is the heaviest of all the precious metals weighing approximately twice as much as karat gold. Its purity makes it hypoallergenic, perfect for people who are sensitive to the alloys used in gold. Platinum is also known for its strength and pliability, just one gram of platinum can drawn into a fine wire over one mile long.
Pure 24 karat gold is rarely used in jewelry because it is too soft for frequent wear. Gold is mixed with alloys like copper, silver, nickel, and zinc to give different colors, strength, and durability. Gold's purity is measured in karats, which indicate out of 24 parts how many parts are gold. For example, 18kt gold contains 18/24 gold and 6/24 alloy, while 14kt gold contains 14/24 gold and 10/24 alloy. Gold is traditionally seen in yellow and white colors, but can also be available in rose or green on occasion.
Sterling silver is usually 92.5% silver and 7.5% copper. Silver is much more plentiful than platinum or gold and is much less expensive. It takes on a much higher polish than any other metal, but it does tarnish. The tarnish can be removed, but silver requires much more care than other metals.
Titanium is a light, strong, and corrosion-resistant metal. Titanium offers you seven times the strengh of platinum at about 1/3 of the weight. It is the hardest natural metal on earth and therefore offers more scratch resistance than gold or silver. In addition, titanium is also hypoallergenic. When ordering titanium rings, be extra sure about your ring size. The biggest drawback of titanium rings is that they cannot be sized by traditional ring sizing methods.
Stainless steel is a low cost alternative to traditional metals. It is naturally hypoallergenic and will not rust or tarnish. Stainless Steel will not break or bend under normal usage and is stronger than any other alloy.