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Featured Gemological Article
Collecting Prescious And Semi-Prescious Gemstones
By Lee MacRae
Many people today say collecting loose gemstones or loose diamonds is their favorite hobby. Many people have a great love of the various gemstones you can find just about everywhere in the world. Follow along as we examine the things you need to know in starting in this interesting hobby.
To begin with you need to read up on the various gemstones available. This knowledge will help you to know what exactly you're looking for so you buy the right items. Without the proper knowledge you can make costly mistakes.
The first criteria you need to evaluate is stone color. It is a fact that gemstones are the most intensely colored natural materials you can find. Gemstones are so related to color that they've even had their names combined with associated colors. Everyone knows ruby red, emerald green, sapphire blue, aquamarine, turquoise, and jade green Gemstones are valued much higher when they equal the colors in the spectrum of orange, green, yellow, violet and blue. They are valued much less the farther they deviate from the natural color.
Cut is one of the all-important 4Cs and is used not only to appraise diamonds along with gemstones. An excellent cut will showcase the natural color of the gemstone, diminish any inclusions, and highlight the proportions and symmetry of the stone. One way of determining the excellence in the cut is to look at how consistently it reflects the light throughout its surface. If the gemstone is cut to shallow most of the light will refract out instead of reflecting internally. The gem appears washed out.
The clarity in a stone is the next item to consider. Gemstone clarity relates to the amount of inclusions (trace elements or large particles of other elements or minerals) that a gem has. A gemstones that is normally found to be clean is obviously worth more. To determine the flaws not seen with the unaided eye you need a gem microscope or 10X gemstone clarity magnifier. Many hobbyists will employ a 10X jewelers were gemstone loup for viewing stamps, coins, beads as well as gems.
Next to consider are weight and size. Save for pearls and corals, all gemstones are valued by the unit called the carat. One carat is the equivalent of 0.2 grams Be aware however, that weight and size are not always equal and gemstones. Density or specific gravity can very. Take a diamond that is 1.00 carats in weight and you will find that a similar sized ruby or sapphire weighs 1.20 carats.
Getting involved in collecting gemstones can become an enjoyable pastime and also rewarding in the long run. You can start small and don't have to spend a lot of money and yet you can buy some very beautiful items. Many people loved to spend weekends to go hunting gemstones. For example in Arkansas you can find Clear & Smoky Quartz, Diamond and Agate. And if you like to travel farther you can find opal at Lightning Ridge in NSW, Austalia, topaz in Beechworth, Victoria or hunt the sapphire fields in Anakie, Rubyvale, Sapphire, Glenalva, The Willows, Inverell or Glen Innes in Queensland, Austalia.
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Peridot is given as a symbol of fame, dignity, and protection. Legend has it
that pirates favored peridot to protect them against evil. When the peridot was
set in gold it also protected the wearer from terrors in the night. Peridot has
been mined from St John's Island in the Red Sea for over 3500 years. Peridot is
the created during volcanic action. Occassionally, Peridot crystals are found on
the black sands of Hawaii. Peridot is the US State Gemstone of Nevada.
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Topaz is full of mystery, in fact there is a famous movie mystery thriller named
after it. The Topaz is well-known as a large quality gem. The worlds. largest
topaz crystal was found in Brazil at the Minas Gerais, the world.s most well-
known producer of topaz. It was purchased in 1938 by Allan Caplan, a New York
dealer in minerals and precious gems. Upon his first inspection of the stone he
thought there might be something wrong with it, and this particular stone along
with two others were sent the American Museum for further study. What the
experts found was the largest topaz known to that date. It is still housed at
the museum.
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Rubies and sapphires are different colored varieties of the mineral corundum.
Now corundum is a fairly common mineral. Second only to diamond in hardness it
has been mined extensively for abrasives. The emery on your emery boards and
sand paper is corundum. Gem quality corundum is quite a bit rarer, consisting of
only a percent or so of all the corundum found. The most common of the gem grade
corundum is blue sapphire. Sapphire comes in every color of the rainbow and the
other colors are rarer than the blues. This may be a bit of a surprise as the
blue ones are so valuable. However, the law of supply and demand comes in here.
Most of the people wanting a sapphire are looking for a deep blue gemstone, not
something yellow or green. Hot pink sapphires and the pinkish orange variety
know as padparasha do demand a high price in the market place. Generally though,
it is the demand for blue gems that fuels the pricing here.
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