Sunday, 7 October 2007

Emerald Jewelery

by : Michael J Moore

There are a number of factors to consider when buying emerald jewelery.

Firstly always ensure you buy emerald s from a trustworthy dealer or jeweler. Preferably one who specializes in precious gemstones and emeralds in particular if possible.

Many gemstones are heat treated, including emeralds. This is done to bring out the colors more and sometimes to even change the color of a stone. Find out if the stone has been heat treated in anyway. Also if it has been irradiated, coated or dyed. Sometimes these treatments will devalue the stone but other times may even increase the value.

Check the color of the stone. Generally speaking the deeper the color or hue the more valuable the stone will be. The gemstone should be near perfect with no visible flaws visible to the naked eye. The surface should reflect light and the stone have perfect clarity. There should be no visible flaws or scratches on the surface of the stone.

Make sure you can examine the stone from all sides and angles. Turn it over in your hand. Also try and get the opportunity to examine the stone in natural light. Many gemstones will change tone or even color in artificial light.

Pure genuine emeralds are not cheap. If you are offered a cheap emerald s it is most likely not genuine but a fake.

If possible get a certificate stating the type, quality and details of the stone from the dealer. Make sure it is very specific. If at anytime you discover the stone is not as described you want to be able to return it and get a refund so ensure the dealer has a returns policy that allows for this.

If the stone has been set in a ring or other metal ensure that you can see the back of the stone. This is important as if the back is blocked off then there will be limited light able to shine through and the stone will not look as good. A stone should have a claw setting and not be glued in place. Glue can deteriorate over time and the stone be lost.

Taking the above factors into consideration will assist to finding and keeping emerald jewelery for many years to come.

http://allabout contains much information about emeralds.

Permission to use this article is granted provided the link is included.

Precious Stones Explained

by : Sam Serio

The mineral to which the term " precious stone" is applied, must be adaptable for jewelry or ornamental purposes and must possess beauty, hardness, and rarity.

The beauty of a precious stone or gem consists of its color or colorlessness, brilliancy or softness of luster, and transparency. To take a high and lasting polish, a mineral must be hard, —and many stones that would otherwise be highly valued are low in the estimate of worth because they do not possess of sufficient hardness to make them endure the wear and friction to which a precious stone is subjected when used in the form of jewelry. The rareness of precious stones has a decided effect in determining their values. For instance, the crocidolite, commercially known as tiger-eye, was sold by the carat some years ago, and was largely used in the making of fine jewelry. Today, this material is so plentiful that it is no longer classed among the higher gems, but serves for cameos and intaglios like chalcedony and onyx.

The changes of fashion have much to do with determining the market value of precious stones. Amethysts, topazes, cat's-eyes, aquamarines, alexandrites, and even emeralds and opals have been eagerly sought for at times and then again neglected for other gems, causing a sensible difference in the value of these stones.

It has been a mooted question as to the proper dividing line between stones that deserve the title “precious,” and those, which should be placed in a so-called semi-precious or lower category. To draw such a line is hardly possible, as neither hardness, rareness, nor value would be a positive test--some of the hard stones, like zircon and almandines being less valuable than softer opal, while the diamond, one of the most plentiful of precious stones, is at the same time, one of the most valuable.

Neither can price be taken as a complete test, because fashion makes a turquoise, an opal, or an emerald much more valuable at one time than at another, All precious minerals used for ornamental purposes, from the diamond to quartz, or chalcedony, may properly be termed precious stones.

The Final Word On Precious Stones

The most precious stones are the diamonds, emeralds, rubies and sapphires. The pearl is oftentimes classed with precious stones. Although strictly speaking while it is not a stone it holds an esteemed place in jewelry.