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Published by: fyou@hotmail.co.nz on Sep 21, 2011
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The Astral GemstonesOne Ratti = 120 mgOne Carat = 200 mgNatural Gemstones are found in the womb of the earth. Since time immemorial,Gemstones have been the valuable possessions of the rich and the kings. There aremany kinds of Gemstones found in nature. Some of them are precious stones, becauseof their rarity and subsequently their value. The others were categorized as thesemi-precious stones, because of their ample availability and subsequently theirprice. Each of these stones have their own quality and property, by way of colour,luster, clarity, and appearance.Here, I shall only describe the astrological Gemstones, their qualities,properties, appearance and merits. The value of these Gemstones will vary fromcountry to country, and it is generally difficult to fix a price for a particularGemstone, specially the precious ones. However, there is a general yardstick bywhich all the Gemstones are assessed and evaluated. They are the four C's. Namely
 Colour, Cutting, Clarity, and Carat. A stone may generally be of some colour,
 but the depth of the colour would make a difference. For example, an Amethyst isgenerally of a violet colour, but from some different mines, it may be of a deepviolet or purple colour. Then the cutting makes a difference. A Gemstone sparklesand reflects it's own light because of it's cutting. The cutting is called facets.These facets reflect the colours. Greater the facets, greater the reflection.Clarity means transparency. All Gemstones have some inherent inclusions and spots.Again, greater the clarity, higher the value. Lastly, the weight. All Gemstonesare measured in Carat weight. Therefore, bigger the Gemstone, bigger the bill!The quality of gems are graded on the basis of four qualities, known as the "fourC's." They are-1. Color2. Clarity3. Cut4. Carat (size)The foremost things to understand by gems are that they are graded on the basis oftheir rarity. What is best for a native may not be the top or rarest grade of agem. Hence the term "quality" does not necessarily mean that one gem is betterthan another.There are plenty of varieties found in a mineral deposit. So one of the firstthings to notice is the size variation. Conversely, simply being larger does notmean that it is better. For Purpose of astrological gems the most importantcriteria are as follows:Let us learn more about the 4 CsColorColors are described by three factors:Hue- (red, green, blue, etc.)Saturation- (strong or pastel, red or pink.)Tone- (light to dark.)Usually, stones with high values possess pure hues and strong rich colors. Withhigh value gems, subtle variations make a significant difference in price. It isnot possible for a layman to see the difference, but to the expert grader it isimportant. On moderate priced gems, color has less affect on value. It is theother factors of size; clarity and cutting that determine the gem's value.
The best example can be taken of diamond whereas the color is concerned. Diamondsare evaluated on how close they are to being colorless. There are three grades ofcolorless that only vary by subtle differences in transparency. Then there arefour grades of white. It takes an expert in laboratory surroundings todifferentiate between these grades, excluding each represents a change in value.ClarityGemstones contain a wide variety of inclusion, like little bits of minerals,hollow areas, or fractures. An inclusion is defined as anything that will hamperwith the free passage of light.Tiny color differences have a significant affect on value. Again the best examplesof this are diamonds. There are several rankings where the inclusions areinvisible to the naked eye and have no affect on the beauty of the stone. Yet thedifference in value is significant because something that is very difficult for anexpert to find with 10-power magnification and something that is easy to find withenlargement hold enough importance.Most colored stones are simply graded as "eye clean," slightly, moderately, or
 but the change is not applied equally. The clarity of certain gems cannot becompared with other gems. If you want a certain gem without any eye visibleinclusions, you are restricted to go for small stones. Similarly if you want alarger gem then you will have to accept a certain amount of inclusions and get itsvalue through it color. But fractures and cracks are not at all permitted inastrological gems.CutThe cut of a gemstone is also one of the most important factors in its appearance.It is also one of the most complicated factors for the amateurs to judge due tothe number of disparities involved.Usually some gems are cut in free form but most are planned to be cut in asymmetrical shape. Primarily it should be proportioned in all directions. It isfor the wearer to decide that what will be the effect of the shape over theappreciation of the stone.A gem should be always inspected with magnification. The areas of light reflectionshould be smooth and mirror like. If it is a faceted gem, look at the partjunctions also. A well-cut stone will be crisp and collaborate on a single point.The individual facets sometimes also affect the brilliance of the gem.A fair idea of the cutting quality of a gem can be acquired by comparing it withother gems, but within similar stones. A topaz will never have the brilliance ofan amethyst and dark stones will not be as bright as light colored ones. A cuttingcan have great effect on the two different gems; one might have much morebrilliance and sparkle than the other on because of expert cutting.CaratHere a simple rule is followed; larger stones are less common than small ones.Hence, they demanda superior price per carat. For example a half-carat gem will be of half of therate than that ofa full carat gem. The choice of the correct size can be subjective. Large gemmirrors are moresuitable for daring and energetic individual, whereas, small stones are suitablefor natives withsubtle and understated flavor.Smaller stones have a significant advantage overpricing and budget. The reason is that volume goes up faster than the outside dimensions.Small gemsare oftenclustered to give the illusion of more gemstone. But for astrological purpose asingle diamond is
necessary and not clusters of small diamonds making up the weight.Clarity Scale IFExtra Fine Quality. These gems have microscopic inclusions which are difficult toslightly difficult to see under a loupe with 10X magnification. VVS1Extra Fine Quality. Small pin-pricks are just visible to the scrutiny of theclose nake eye. However, the beauty of the gem is not diminished in anyway VVS2Very Fine Quality. Small pin-pricks are just visible to the scrutiny of the closenake eye. However, the beauty of the gem is not diminished in anyway VS1Good Quality. Small pin-pricks and feathers are just visible to the scrutiny ofthe close nake eye. However, the overall beauty of the gem is still not diminished VS2Good Quality. These gems have inclusions which are fairly easy to see to theclose naked eye. However the overall beauty of the gem is still high. SI1-2Good to the medium qualities. Included gems with internal features that rangefrom eye visible to easily seen to the naked eye.Opaque/TranslucentHighly included,Translucent DIAMONDDIAMOND - (Specific gravity - 3.52, refractive index - 2.42)Diamonds are the most expensive of all the precious stones. Chemically, it is justplain carbon. White Diamonds of a flawless quality are considered the best, andthe most expensive. KNOW MORE
BLUE SAPPHIREBLUE SAPPHIRE - (Specific gravity - 4.03, refractive index - 1.76)Sapphires come in many colours, but the three principal colours are Blue, Yellow
 and White. Sapphires belong to the Corundum group of stones and can be pink,violet, light blue, dark blue, yellow or green. KNOW MORE
YELLOW SAPPHIREYELLOW SAPPHIRE - (Specific gravity - 4.03, refractive index - 1.77)Yellow Sapphires are nice sparkling light yellow coloured stones. There are somestones in the market, which are coloured or dyed through heating process. This isdone to darken the colour of the Gemstones, so that they could be sold for ahigher price. KNOW MORE

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