Monday, January 19, 2009
Moonstone is a kind of feldspar, the most abundant mineral group in the crust of the Earth. Feldspar is mainly composed of silicates of aluminum with traces of other minerals such as sodium and calcium. When feldspar forms with potassium and attains a translucent, pearly form, it is known as a moonstone. The name of the moonstone comes from the similarity it has to the moon, and moonstones have been used in jewelry, especially for women, for centuries.
Several parts of the world, as well as Sri Lanka, have deposits of moonstone. Moonstone is classified as an orthoclase, meaning that it forms around volcanic and hydrothermal deposits, and has a translucent appearance, along with a sparkling luster. Moonstone is a type of orthoclase known as adularia, after the Adula Mountains of Switzerland, where the stone is abundantly circulated. Adularia crystallizes at a low temperature, and when it takes the appearance of an opalescent stone, it is classified as a moonstone.
When found in the rough, a moonstone is not an exciting sight. A skilled stone cutter must bring out the bright appearance of the stone, which must be cut with care. Normally, moonstones are cut in the form of a cabochon, a rounded and polished cut which lacks facets. The cabochon can take any form, though teardrop, round, and oval cabochons are all common. If cut properly, the stone will glitter and flow, exhibiting a property called adularescence, after the family of rock that moonstones come from.
posted by Tamil Nadu ,Tamilnadu Government,Places,Wild Life,Hill Stations,Temples,Sports,Accomodation,Cusine,Fine Art @ 10:43 PM
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Monday, January 12, 2009
Engagement rings and wedding rings are different both in look and symbolism. Usually engagement rings are worn prior to marriage to signify one's engaged status. The most general engagement rings are diamond solitaires, though engagement rings can be any color or choice of stone depending upon taste.
Like wedding rings, engagement rings to worn on the left hand ring finger. They are purchased alone, or they may be sold as part of a set. When the person is married, the wedding ring portion of the set is added and tends to be worn under the engagement ring on the ring finger of the left hand.
Wedding rings can also be sold individually from engagement rings and may be comparatively simple in design. Simple gold or platinum bands are still quite admired for both men and women. It's a good idea to choose from engagement rings that will fit with a wedding band, or alternately to get a set if the ring has any designs that might make it incompatible with a simple band.
Some wedding rings, especially in a set can also be quite complicated. They may include diamonds or other stones that set off engagement rings wonderfully. If engagement rings have peculiarities in shape and are not sold in a set, an alternative to purchasing a band that does not equal is having one designed to fit with the engagement ring.
In additional, often engagement rings and wedding rings that are designed to go together may be welded in the back to reduce friction of the rings rubbing together. Friction will eventually wear the rings down, particularly if they are 14 karat gold or higher. Most jewelry stores can achieve this simple operation a few days before a marriage takes place so women do not have to be without their engagement rings for long.
It is commonly customary for women to wear engagement rings. There are male engagement rings however these are less common. Usually both new husband and wife will wear wedding rings. Unlike engagement rings, wedding rings are generally not worn until after a marriage has taken place. While a diamond solitaire on the left ring finger may point out a lady's gagement, a simple band worn on the left hand ring finger by either a man or a woman signifies that the person is married.
posted by Tamil Nadu ,Tamilnadu Government,Places,Wild Life,Hill Stations,Temples,Sports,Accomodation,Cusine,Fine Art @ 4:34 AM
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Friday, January 2, 2009
A white sapphire is a colorless form of sapphire used in a extensive range of jewelry as a diamond substitute. Sapphires tend to be much less expensive than diamonds, and socially awake purchasers who are concerned about conflict diamonds can avoid political issues by purchasing sapphires instead. Most white sapphires are heat treated to obtain the desired clear color, as it is very rare to find physically occurring white sapphires. Some may also be chemically treated, depending on the superiority of the stone and its intended use.
Sapphires are a kind of aluminum oxide which forms in a crystalline pattern. There are various uses for sapphires, ranging from industrial lasers to fine jewelry, and the stones also come in a wide range of colors, despite the traditional association with the color blue. Sapphires also come in purple, yellow, and brown, and they may have strange properties which cause them to reflect light in a star pattern or change color under certain lighting conditions.
There are two main sources for white sapphires. Grey to light yellow natural stones may be treated to become clear, and some companies also grow their own stones, creating synthetic sapphires which are chemically equal to the real thing. A synthetic white sapphire tends to be less expensive, because consumers distinguish lab-grown gems as inferior, but it may sometimes be of better quality, thanks to the controlled growing conditions. Normal sapphires are found in Southeast Asia, the Indian subcontinent, parts of Africa, the Middle East, and in the Western states of America.
posted by Tamil Nadu ,Tamilnadu Government,Places,Wild Life,Hill Stations,Temples,Sports,Accomodation,Cusine,Fine Art @ 3:12 AM
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Thermal stability of Diamonds
Synthetic and Artificial Gemstones
Heat treatment to Gemstones
Industrial uses of Diamond
Diamond Clarity
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