Gift Ideas & Occasions
Ordering my Jewelry
Order & Delivery Dates
Ruby & Sapphire
The Ruby and the Sapphire belong to the Corundum family of gemstones. In terms of hardness, corundums are the next most hardest gemstones after diamonds. Rubies are simply red sapphires. The term sapphire is most commonly associated to the blue sapphire, but the color spectrum of sapphires is quite large. Like diamonds, rubies and sapphires are quite rare and very precious. In fact, large three-carat rubies and sapphires can fetch three times the price as a similar sized diamond. In general, though, diamonds are the more valuable stone.
The most interesting and comprehensive web site about rubies and sapphires
can be found under the following links (we will not assume any responsibility
or liability for the contents of these suggested links):
however, as the information, therein is quite detailed and lengthy, a summary of the most important features about these gemstones are summarized in the following sections.
As in diamonds, rubies and sapphires are also valued by their 4 C’s (Color, Clarity, Cut and Carat Weight), however unlike diamonds, Color is the most important feature for buyers of this gemstone.
4 C’s of Rubies & Sapphires
Hue, tone and intensity are the three important scales in measuring these gemstone’s colour.
A final word on colour:
Nearly all sapphires and rubies are heat treated to enhance their colour. Colour enhancements do not result in synthetic gemstones, but corundum gemstones which do not have colour enhancements are usually more valuable if they are equally strong and vivid in colour. Colour enhancements are desired by buyers, as they give the stone a deeper more glowing colour. Heat treated stones can be identified in that the fine silk inclusions are shriveled to a little white dot. Don’t mistaken heat treated stones for internally flawless synthetic stones.
Colour is an individual taste. The colour value of a stone may be quite high but still not match your skin tone. Like with lip sticks, it is generally recommended to test the colour of the stone next to your skin to verify whether the colour suits you.Clarity
Unlike diamonds, fine blemishes and inclusions are a quality feature of the corundum family of gemstones. This makes it difficult to judge clarity. As a general rule, corundum gems should be eye-clean, that is there are no inclusions visible to the unaided eye, however given magnification, extremely fine silk throughout the stone can actually enhance the beauty of the corundum gemstone. So in essence, the stone should be transparent, yet slightly hazy.
Clarity is a measure of how free from claws a gemstone is. Internal flaws are called inclusions and may block colour consistency. They appear in the form of cracks, crystals, silk, cavitites, chips and other color hues. External flaws are called blemishes, and they may appear in the form of scratches, pits, nicks and abrasions.
As in diamonds, clarity is measured against a scale of degree of inclusions ranging from VVS (very very slightly included) to I (included) and worse. The clarity grade IF (internally flawless) does not exist for corundums. Flawless rubies and sapphires are fake or synthetic stones.
Unlike diamonds, the cut of rubies and sapphires is not nearly as significant
as their color and clarity features. Corundums are cut to maintain maximum weight
while exhibiting optimal color and brilliance. Cut refers to a) shape (round,
oval, pear, rectangle, etc), b) proportion (symmetry and depth proportion between
crown top and pavillion bottom), c) style of facet, and d) finish. As corundums
are not internally flawless, light reflection plays a smaller role than in diamonds.
While the shape of a gem and the style of its facet is subject to individual
taste or requirement in a design, its overall symmetry should be consistent,
i.e. an off-centre culet (bottom point) immediately results in a bad quality
Corundum is a very dense gemstone. A one carat corundum may therefore be smaller than a one carat diamond or other precious gemstones. Given good colour and clarity, the larger the carat number, the more valuable the gemstone. Larger sized corundums appear more beautiful than chip sized gemstones, that is corundum stones smaller than 0.03 carats, therefore avoid using chip sized rubies or sapphires in your jewelry.Quality ranking of rubies by country
The www.ruby-sapphire.com link further gives an account of Quality Ranking of Rubies by Country:
An approximate ranking of important ruby origins is given below. This applies only for the finest untreated qualities from each source and is but a general approximation. In other words, a top-quality Thai/Cambodian ruby can be worth far more than a poor Mogok stone.
1. Mogok, Burma
Sri Lanka (Ceylon)
The Birthstone for the month of May.
Emerald is commonly known as the "Queen of Gems", and has been treasured for at least 5,000 years. Traveler's relied on emeralds as protection against the hazards and perils of long journeys. Emerald also symbolizes rebirth, fertility and youth.
Emeralds are mined in Columbia, Brazil, Zimbabwe and Zambia.
4 C’s of Emeralds
Emeralds can range in color from bluish-green, to green, to yellowish-green (not as common). The hue is not the only aspect that affects the overall color of this gemstone though. The tone (lightness to darkness) and the saturation (vividness of the hue) also affect the color. If the tone is too dark, it may mask the luscious green hue. If the saturation is too dull, the emerald will look washed out and grayish. The most valuable emeralds have a green or bluish-green hue, a medium tone, and a strong saturation.Clarity
Clarity is the rarity factor that indicates the degree to which an emerald is free of internal inclusions and external blemishes, called "clarity characteristics". Generally speaking, the more inclusions there are, the less transparent a gemstone will be, and the less expensive it will be.
Most all emeralds have natural inclusions of some kind, which is why they are clarity graded with some leniency. It is extremely rare to see an emerald completely free from inclusions. The inclusions in emerald are often referred to as "Jardin" meaning garden of inclusions. Too many inclusions, though will make the emerald look milky and it will no longer be transparent.
Because of the nature of emerald's inclusions (fractures and liquid), they should not be subjected to high temperatures, such as a jeweler's torch, ultrasonic cleaner, steam cleaner, or even hot dishwater. This may cause the liquid to shift in the emerald, and cause the emerald to fracture further.Cut
"Cut" generally refers to the shape of the emerald. Emeralds can be cut into most all shapes, however, the most common shape for emerald is the step cut and is most commonly referred to a the "emerald" cut. Cut can also refer to the dimensions and proportions of the emerald. The proportions are what make an emerald appealing, look balanced from left to right and top to bottom, and give it optical efficiency. Colored gemstones are not cut to such rigid dimensions and angles as are diamonds.
When cutting a colored gemstone, the cutter thinks about saving the most weight from the rough (gemstone before it is cut), and about bringing out the best color possible. The cutter can affect the color of a gemstone just by the way he/she cuts it from the rough. If the rough is too light, the cutter may cut the emerald with a deeper pavilion (bottom of gemstone) to make it look darker. If the rough is too dark, the cutter may cut the emerald more shallow to allow more light to pass through it, thus making it lighter in color.Carat weight
If all other factors are equal, the larger the emerald, the more valuable it is. Emeralds are quite dense, and for this reason, a one carat emerald may look smaller than other gemstones. Compared to rubies, though emeralds will look larger.
Our colored stone buyers work with loose emerald dealers from around the globe to offer the most beautiful selection of emeralds, with luscious greens that make the term "emerald green" famous. We feature emeralds from Columbia, Brazil, Zambia, and Zimbabwe.Treatments
Early emerald miners sought to enhance the color and clarity of emeralds by immersing them in clear oils and waxes. It was found that clear oils and waxes made surface reaching fractures almost invisible to the unaided eye. This technique is still used today, but with more advanced technology. Resins are now often used to fill the surface reaching fractures in emeralds, then, the entire emerald is covered with a hardener, to make the filler more stable. Sometimes the oil may be colored green, to enhance the color of the emerald. The colored oil is not as widely accepted as clear filler, though. Fracture-filling, which is essentially performed on all emeralds in the trade, is not permanent. If the treated emerald is subjected to high heat from a jeweler's torch, an ultrasonic cleaner, a steam cleaner, or even hot dishwater, the filler may seep out of the emerald. If this should happen, however, it can be replaced.
Style of Setting
Workmanship & Design
Tips for Care
Suggestions for Us
|Back to Top|
|© 2007 Copyright Notice