All sapphire treatments should be fully disclosed by any reputable dealer. Type: Natural Sapphire personally confirmed as Genuine Sapphire by digital refractometer (RI=1.784), dichroscope, polariscope, spectroscope, UV short&long-wave lamp, measured Specific Gravity=3.98 -- captej2012 Color: Blue-Green (please note the diagonally-demarcated color-zone in the photos) -- captej2012 Shape: Oval-cut Dimensions: 8.12mm x 6.08mm x 3.42mm Weight: 1.74 ct Luster: TopFire Clarity: SI1 Note: This is an UnHeated Sapphire; most Sapphires are Heated for permanent/substantial color/clarity improvements. Not Heated, Not Enhanced, Not Treated -- which is not typical of Sapphire gemstones. Metaphysical: Some practitioners prefer the original-state "raw" Sapphire for its pure unaltered qualities. The Kids were Young when We called the Ocean Wide-Blue.When Such are the Sentiments to be Stored in a Stone, What Better than the Sunny Magic of a Blue Sapphire? I brought Wide-Blue home to Contain the Moments. Moments when Family was their Only World.
When Innocence, a Chance for Wonder. When Laughter, a Note of Joy. When Song, a Lack of Fear. Wide-Blue saw My Love drive me in Everything. I Worked and Gave My All for Family.Still could I have Done Better and Provided More? Nay, One's Best is All Any Can Do.
Stay here, look around and learn. We pride ourselves as good-spirited folks having fun and doing our best to share the joy of Nature's most beautiful and enduring literal treasure -- Natural Gemstones. Expect to find us cheerful and trustworthy, and we will expect the same of you. About Sapphire - History and Introduction.Is a gem quality variety of the mineral corundum. Corundum itself is not a very rare mineral, but gem quality corundum is extremely rare.
Most corundum is opaque to translucent and heavily included, suitable only for industrial use, including the production of abrasives used for sandpaper and machining of metal, plastics and wood. Comes from the Sanskrit word. Meaning "ruby sapphire", while the name.
Comes from the Persian word. Derived from the Greek word for. In times of antiquity and the Middle Ages, the term sapphire actually referred to lapis lazuli, but in the early 19th century, the description and definition of sapphire was changed to the corundum variety we know today. While blue is the most traditional and classic color for sapphire, sapphire is actually found in a variety of different colors. For many years, only blue sapphire.
Was recognized as'true' sapphire. Today, all colors of gem quality corundum are known as sapphire, with exception to red corundum, which is classified as ruby. There is no definitive demarcation between red ruby and sapphire; in most cases, near-red sapphire would be classed as inferior colored ruby. Thus, it is common practice to trade near-red sapphire as a quality fancy color sapphire, rather than as a lower grade ruby.
Colored sapphire (other than blue) is often referred to as fancy sapphire, and fancy sapphire is typically traded using color-specific names, such as yellow sapphire, green sapphire or purple sapphire. In the past, there were several misleading names used for fancy sapphire varieties, most of which are no longer used, such as'Oriental peridot. , a term which was used to refer to green sapphire.
Sapphire is any form of gem quality corundum, other than red. It is the second hardest mineral on earth next to diamond. Sapphire lacks cleavage, but can exhibit a conchoidal, uneven fracture. Chemically, sapphire is an aluminum oxide with a specific gravity or density ranging from 3.95 to 4.03 depending on the specific sapphire variety.Its refractive index ranges from 1.762 to 1.788 and its crystals can exhibit a weak level of double refraction or birefringence (0.008). Sapphire belongs to the trigonal crystal system, structured with three planes of symmetry and four axes. The exact crystal form depends on the specific variety and origin. Owing to sapphire's superior hardness and durability, it's nearly unmistakable, despite the fact that there are several other gem types that occur with similar colors and luster. Some of the most easily confused gem types include spinel, zircon, beryl, tourmaline and chrysoberyl.
Is found in only a few locations in the world. The three most famous regions for blue sapphire are Kashmir, Burma and Sri Lanka. Sapphire has also been mined in Cambodia. As of 2007, Madagascar has been leading the world in sapphire production, though Sri Lanka continues to be the only steady producer of fine quality blue sapphire. Sri Lanka and Madagascar produce sapphires in a wide range of colors and whilst Sri Lanka has been a known sapphire source for centuries, sapphire deposits in Madagascar were only recently discovered in 1998.The enormous deposits found in the village of Ilakaka came as a big surprise and led to a gemstone fever reminiscent of the 19th century Californian gold rush. Today, Madagascar and Tanzania are considered to be two of the most important sapphire sources. Australia is also known for significant sapphire deposits, though most Australian sapphire is known to form rather dark in color. In the USA, there are small sapphire deposits found throughout Montana and North Carolina. Comes from Kashmir and Mogok, Burma. The finest Kashmir and Burmese sapphires display superb color and clarity without any thermal (heat) treatment. In recent times, limited resources in Burma have led miners to focus on more plentiful Burmese ruby. Some Sri Lankan (Ceylonese) sapphires are also unheated. But nowadays, the majority of sapphires have been heated, diffused or fracture-filled to improve color and clarity, regardless of their origin. The Kashmir mines, high up in the Himalayas, have produced spectacular world-renowned gems, but since the 1920s, virtually no new material has been found.
The rare, fine blue sapphires of Pailin, Cambodia were also very highly regarded by gem traders throughout the world. Pailin sapphires ranged in color from light to deep blue, but they possessed a distinctive purity and intensity of color that was unlike any other sapphire sources.
Many gem traders graded them as close in quality to Kashmir and Burmese sapphires; and certainly superior to Sri Lankan (Ceylonese), Thai, American, Vietnamese, Indian, African and Australian sapphires. Almost all the sapphires from around the world are cut and processed in Chanthaburi, Thailand.
Along with Kanchanaburi and Trat, Chanthaburi. Was once one of main sources for Thai sapphire. Sapphire mining in Chanthaburi is mostly finished now, though there are a few small private mining locations scattered throughout the province. There is also a large market for Thai star sapphires that exhibit distinctive golden six-rayed stars.
The golden black star sapphire is found nowhere else in the world. Nowadays, Chanthaburi, Thailand has become the main processing and trading center for almost all of the world's sapphires, rubies and other colored gemstones. Blue is the best-known of the sapphire colors.
The prized Kashmir and Burmese sapphires have a deep blue that is intense and velvety. These sapphires are not often seen on the market today. Sri Lankan and Madagascar sapphires are the most common today, with a wide range of colors from light blue to dark blue. With blue sapphire, the intensity of blue is the most important factor.For example, a huge sapphire with a washed-out, weak blue color is much less valuable than a much smaller stone of excellent color. An intense, rich pure cornflower blue that is not too dark or too'inky' is the most desirable colour. Overall, sapphires that are too dark or too light in color are less valuable, but light-blue sapphires often have greater brilliance that is rarely found in darker blue stones. Colorless sapphires are actually quite rare, since most stones will exhibit some faint hints of color.
Sapphire colors are best viewed under natural daylight. In artificial or incandescent light, sapphire colors can appear darker and inky black-blue.
Many may even appear redder and less attractive than they really are. Sapphire colors are a result of trace impurities. The coloring agents found in blue sapphire are typically iron and titanium. Violet stones are colored by vanadium.
And purple sapphire are often colored by iron and titanium impurities. Most yellow sapphire is naturally on the lighter side. It is through heat treatment that a more intense yellow golden color is produced.
Beryllium-treated sapphire may result in brilliant bright yellow. Small traces of iron can cause yellowish and greenish hues in stones. Chromium is known to produce fine pinks (and red in ruby), whilst iron and vanadium together can produce lovely orange stones.
Padparadscha sapphire is a very rare sapphire with a pinkish-orange hue. A true padparadscha will always have a hint of pink. Many'green' sapphires consist of fine alternating bands of blue and yellow sapphire, which are visible under a microscope. Sapphire can occur transparent to opaque. Transparent materials are the most valuable.Some translucent materials are cut into beads or cabochons. Opaque materials have very little gemstone value, although they may sometimes be used for ornamental carving.
Sapphires are generally cleaner than ruby, so it is best to look for stones that are eye-clean. Eye-clean stones in larger sizes are quite rare, especially in ideal colors. In some cases, extremely fine silk throughout the stone can enhance the value of some sapphires. The famous sapphires from Kashmir have a velvety blue color which is caused by this fine silk.This same silk causes the asterism seen in star sapphires. However, too much silk weakens the color, rendering it an undesirable grayish colour. The rutile needles that are responsible for the silky shine reflect the light in sixty-degree angles.
If the rutile needles are perfectly aligned in the same direction, the inclusions can result in six-rayed asterism when cut en cabochon and viewed under strong light. Sapphire exhibits an attractive vitreous luster. Various shapes and cutting styles are common with sapphires. Ovals, cushions, and rounds are commonly seen, as are other shapes, such as fancy hearts, pears and emerald cuts. Round stones can command very high premiums, especially in diamond-cut calibrated stones weighing 1 carat or more.Cabochons are common for translucent stones or for stones with visible inclusions. Briolettes, beads and tumbled sapphire can also be found, but is usually lower grade material. The most common treatment for sapphire is heat treatment, though unheated. Most sapphires today are heated, and unheated stones in rich blue can command enormous prices in today's market. Some blue sapphires may also be diffusion treated, though this treatment is more common for star sapphires.
Beryllium treatment is now being used to produce stunning orange and red colors that were once rarely seen. The item "1.74 ct Natural UnHeated Oval-cut Blue-Green SI1 Sapphire (Sri Lanka)" is in sale since Friday, July 3, 2015. This item is in the category "Jewelry & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Sapphire\Natural Sapphires". The seller is "captej2012" and is located in Canyon Country, California.
This item can be shipped worldwide.