More Information On Gemstones
Our Featured Gemological WriterStarting To Collect Loose Gemstones
By Lee MacRae
Why collect
loose gemstones you ask? For many people it's because they are very beautiful items. And just like
natural diamonds they can become extremely valuable over the years. Many in this hobby love to collect and work with the wide variety of gemstones available today. Follow along as we discuss the hobby of
loose gemstone collecting.
Right at the beginning, what you need is to visit the library and get some books. You want to understand everything there is to know about the subject of gemstones. The more you know about gemstones the wiser will be your purchases. You'll know exactly what to look for in a quality stone.
The first criteria you need to evaluate is stone color. Without a doubt, gemstones are the most intensely colored natural material available on earth. Gems have become so synonomous with color, they've even had their names combined with associated colors. You've no doubt heard about emerald green, ruby red, sapphire blue, jade green, turquoise or aquamarine. Gemstones are valued much higher the closer they are to the colors in the spectrum of violet, blue, green,, orange and red. They drop in value the farther they deviate from the pure natural color.
The cut of the stone is extremely important and is used not only to appraise diamonds along with gemstones. A precision cut gemstone highlights the natural color of the gemstone, diminishes its inclusions, and show off its symmetry and proportions. One way of determining the excellence in the cut is to look at how well and consistent it reflects light throughout the surface of the stone. If the gemstone is cut to shallow much of the light will refract out of the gem rather than reflecting inside the stone. Gemstone color will be washed out.
A third consideration is the clarity of the gemstone. This is talking about the stones purity with no internal conclusions, spots, or particles within the crystal structure. Without a doubt, zero flaws would make the gemstone highly valuable.
Next to consider are size and weight. Other than the corals and pearls gemstones are priced by the carat. One carat is the equivalent of 0.2 grams However you should know size and weight and gemstones are not the same. Density or specific gravity can vary in gemstones. Take a diamond that weighs 1.00 carats and you will see that a similar sized ruby or sapphire is 1.20 carats.
Taking up the hobby of gemstones can be very enjoyable and could be rewarding as well over time. It doesn't have to be very expensive and yet you can end up with some very beautiful stones. Many people love to take vacations to go looking for gemstones. Take the example of the US. In Maryland you can search for Beryl and Clam Pearl. And if you like to travel farther you can find opal in Coober Pedy, Andamooka or Mintabie in South Australia, topaz in Beechworth, Victoria or check out the Moonstone regions in Moonstone Hill, Queensland, Australia.
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Tiger Eye Quartz is used in cabochans and beads where it's lovely tiger-like
quality comes out best. Generally, you will not find faceted tiger eye. This
stone is often called "Tiger's Eye" or simply "Tiger Eye". Tiger Eye is black
with iron oxide staining which gives it yellow and golden brown stripes. It is a
type of chatoyant quartz. Tiger Eye has a hardness of 7.
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In general zircon is transparent to translucent. Impurities cause the various
color. Zircons with a cat's eye effect are known but rare. Some crystals contain
radioactive thorium and uranium. Over time, the radioactivity breaks down the
crystal structure so that such stones (usually green) tend to an amorphous
structure, with a lower refractive index and luster than the crystalline type.
These slightly radioactive zircons are very rare in the trade, but highly prized
by collectors and pose no heath threat to its wearer.
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The Best Information On Gemstones
Latest Article On GemstonesSo You Want To Collect Gemstones
By Lee MacRae
The term gemology refers to the science, art and profession of identifying and evaluating gemstones from
loose gemstones to
natural diamonds. A number of people taken up this profession as a passionate hobby. They become interested in collecting
loose gemstones or
loose diamonds. A number of these hobbyists start to visit different areas nearby or in some cases other countries to look for rough gemstones. Some of them will even tumble or finish off the gemstones themselves. If this sounds like a hobby you would like to get involved in follow along as we discuss the different aspects of this hobby.
The first thing you need to do is to visit the library and get some books. You want to learn as much as you possibly can about your new hobby. The more you understand about gemstones the wiser will be your purchases. You need to be as informed as possible.
One of the first things you look at Is gemstone color. Top grade gemstones exhibit colors similar to the exact spectral color of orange, green, yellow, Violet or blue. Gemstone colors that are somewhat muted or too dark can lower the value quite easily.
The cut of your gemstone is one of the most important traits in evaluating gemstones. The stone has to be cut correctly to reflect light properly. A gemstone with an improper cut can't reflect the light consistently over its surface. Color tone, saturation, and hue will never be consistent.
Gemstone clarity is our next factor. When we talk of clarity it 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 more valuable. To see flaws beyond with the eye can see requires a 10X gemstone clarity magnifier or gem microscope. Most hobbyists will get a jewelers diamond gemstone loupe 10X for viewing their coins, beads, stamps or in our case gemstones.
You will often find that gemstones are often listed according to their size criteria since it is more uniform than carat weight. But two different gemstones may have the same size but differ in carat weights and as a result different pricing structures. This is due to the difference in relative density or specific gravity depending upon the materials chemical composition and crystalline structure. Normally a one carat brilliant round diamond of typical proportions will be approximately 6.5 mm in diameter. A ruby that is the same size will weigh in at 1.55 carats instead.
Taking up the hobby of gemstones can be very enjoyable and rewarding in the long run. You don't need to spend a lot of money and yet you can build a very exquisite collection. Many people love to set aside vacation or weekend time to go looking for gemstones. Take the example of the US. In New Jersey you can find Smoky Quartz, Agate, Pearl and Prehnite. Or ou can take a longer vacation and find opal at Lightning Ridge in NSW, Austalia, topaz in Killiecrankie, Tasmania or hunt the peridot fields in Mortlake in Victoria, Australia.
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In parts of the world sapphires may have come from ancient formations that were
once impure marble which developed over time through metamorphic conditions into
crystalline cal silicates known as skarns. A skarn is a metamorphic rock that is
usually variably colored green or red, occasionally grey, black, brown or white.
It usually forms by chemical processes that form rocks during metamorphism and
in the contact zone of magma like intrusions. Skarns in the igneous environment
are associated with marble and wider zones of cal silicate rocks. Mixtures of
corundum, titanium and iron were also a part of the crystallization process.
Because of this process there are numerous inclusions in a sapphire, and like
the ruby, they are useful in verification techniques when authenticating the
stone.
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Rose quartz is a pink stone often worn as crystal pendants or bead necklaces. It
is simple, inexpensive jewelry that goes with everything. Pink or peach-colored
quartz is called Rose Quartz. It has a hardness of 7. Rose Quartz will chip and
crack rather easily. Rose Quartz fades in the sun; most Rose Quartz is dyed.
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Good Grade diamonds: This grade will be generally be a bit darker or lacking in
scintillation. The stone above is dark around its girdle. A stone can also be
downgraded by its pattern, or its weight ratio. I.E. if it weighs more than an
average gem of this diameter, it will be downgraded one step.
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