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Sunday, June 28, 2009

From Britney Spears to Madonna to Beyonce the most recent and greatest jewelry craze is upon us. On the cover of every magazine and every photo shoot to the latest awards ceremonies are the leading names in Hollywood all decked out in silver and gemstones.

The new age woman is one that will state "less is more" when it comes to jewelry accent. Meaning that they are choosing fewer pieces of jewelry but their choices are essentially "Big, Bold & Beautiful" designs to compliment any attire. This new age woman is decorated in breath taking turquoise of every shade, chocolate pearls and the biggest and brightest of topaz, citrine, peridot, and just about any other stone that makes a avowal or a display of color.

Milan, Paris, London, Hong Kong and yes even Toronto are mirrored reflections of Hollywood Who's Who all decked out in Silver complimented by colorful gems and exclusive styles. This trend reported to continue during 2009 gives more choice to the new age woman and more definitive individuality of style, class and color...don't you think.

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Thursday, June 18, 2009

Once you're ready to buy jewelry, shop around. Compare quality, price and service. If you're not familiar with jewelers in your area, ask family members, friends and co-workers for recommendations. Also, when ordering online and you've never heard of the seller, check on its reputation with the Better Business Bureau or the state attorney general's office. You also should:

1. Ask for the store's refund and return policy before you buy. When ordering online, keep printouts of the web pages with details about the transaction, including refund and return policies in case you're not satisfied.

2. Check for the appropriate markings on gold jewelry.

3. Ask whether a gemstone is natural, laboratory-created, or imitation.

4. Ask if the gemstone has been treated. Is the change permanent? Is special care required?

5. Make sure the jeweler writes on the sales receipt any information you rely on when you make your purchase, such as the gemstone's weight or size. Some jewelers also may supply a grading report from a gemological laboratory.

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posted by Tamil Nadu ,Tamilnadu Government,Places,Wild Life,Hill Stations,Temples,Sports,Accomodation,Cusine,Fine Art @ 2:34 AM permanent link | Post a Comment | 0 comments

Sunday, June 14, 2009

Gemstones are not plentiful. Gemstones do not form "ore" deposits in the normal sense.Gems, when present at all, tend to be scattered sparsely throughout a large body of rock or to have crystallized as small aggregates or fill veins and small cavities. Even stream gravel concentrations tend to be small-a few stones in each of several bedrock cracks, potholes, or gravel lenses in a stream bed.
The average grade of the richest diamond kimberlite pipes in Africa is about 1 part diamond in 40 million parts "ore." Kimberlite, a plutonic igneous rock, ascends from a depth of at least 100 kilometers (60 miles) to form a diatreme (narrow cone-shaped rock body or "pipe"). Moreover, because much diamond is not of gem quality, the average stone in an engagement ring is the product of the removal and processing of 200 to 400 million times its volume of rock.

Gemstones occur in most major geologic environments.

Each environment tends to have a characteristic suite of gem materials, but many kinds of gems occur in more than one environment. Most gemstones are found in igneous rocks and alluvial gravels, but sedimentary and metamorphic rocks may also contain gem materials.

Examples of geologic environments in which gemstones are found:

Pegmatite - a coarse-grained intrusive igneous rock body, occurring as dikes (a tabular-shaped body), lenses, or veins in the surrounding rock.

Stream gravels (placers)-deposits of heavier and more durable than average minerals that have been eroded out of the original rock. Often tourmaline, beryl, and many other gem-quality minerals have eroded out of the original rock in which they formed and have moved and been concentrated locally by water in streams. Sapphires in Judith Basin County, Montana, were first found when the gravels were worked for gold from 1895 to 1930.

Metamorphic rocks-rocks that have been altered by great heat, pressure, or both. Garnet, for example, is commonly found as crystals in gneiss and mica schist.

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posted by Tamil Nadu ,Tamilnadu Government,Places,Wild Life,Hill Stations,Temples,Sports,Accomodation,Cusine,Fine Art @ 9:44 PM permanent link | Post a Comment | 1 comments

Sunday, June 7, 2009

First of all, coal is not just carbon. Coal is a mixture of complicated organic molecules derived from ancient plants, fungi, and bacteria. However, in the natural "maturation" processes of coal, heat and pressure change its chemical composition over time so that it becomes nearly pure carbon in the form of graphite.


The difference between graphite and diamond is in the three-dimensional arrangement of the carbon atoms in the material. Graphite is made of flat sheets of carbon atoms in a hexagonal arrangement. The sheets stack one over the other, with only weak interactions between sheets. Diamond is not arranged in sheets; instead, each carbon atom is connected to four others in a tetrahedral arrangement. It turns out that this arrangement is not as different from the structure of graphite as it sounds. If the sheets of graphite are compressed close enough together, the carbon atoms will be in just about the right position to make the bonds of diamond. In fact, at high temperatures and pressures, this indeed happens.


It goes the other way, too. It turns out that graphite is actually more stable than diamond at room temperature and atmospheric pressure. Unless the surface of a diamond is chemically stabilized, the diamond vill convert to graphite! Fortunately, fresh diamond surfaces are easily stabilized by reacting with whatever touched them, so this isn't likely to happen unless you carefully cut a diamond in a vacuum.

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posted by Tamil Nadu ,Tamilnadu Government,Places,Wild Life,Hill Stations,Temples,Sports,Accomodation,Cusine,Fine Art @ 10:02 PM permanent link | Post a Comment | 0 comments

Previous Posts
  • Thermal stability of Diamonds
  • Synthetic and Artificial Gemstones
  • Heat treatment to Gemstones
  • Industrial uses of Diamond
  • Diamond Clarity
  • Diamond formation
  • Color Factors
  • Diamond enhancements
  • Diamond Identification
  • Exploration Diamond drilling


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