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  • Diamond wedding rings, fine gemstones and other jewelry
    type of light and direction of the light that produces the brilliance and fire in a well cut diamond or the beautiful color in gemstones The color you see in a gemstone is the result of the light that returns to your eyes after bouncing off the gemstones crystal structure Now we know what causes color but what makes it a color change or color shift gemstone The element chromium that allows equal amounts of red and green light to pass through it causes color change in Alexandrite Because of this balance of red and green if you view Alexandrite under incandescent light rich in red the gemstone looks like a red Ruby If you then take the gemstone and hold it under an incandescent light rich in blue green the Alexandrite looks more like an Emerald Green This is color change Color shift is representative of colors that can change in the different or the same light source a good example of this would be Tanzanite that will shift from blue to violet purple by tilting the gemstone in the same light source You will find a reasonable amount of gemstones will have this effect especially the ones with rich colors The best explanation of the difference I have used for deciding what is color change and what is color shift is for those that have seen or have access to color grading wheel which is a chart that designates all of the colors of gemstones for grading gemstones GIA calls it the hue wheel and it shows all of the color hues from Blue to Green to Yellow to Orange to Red to Purple to Violet 32 hues in all If a color change moves from Red to the next color on the wheel orange then this is

    Original URL path: http://www.truros.ca/truros/resources/color_change_or_color_shift_gems.htm (2014-10-22)
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  • Diamond wedding rings, fine gemstones and other jewelry
    rated fair for everyday wear with care Avoid exposure to heat contact with chemicals and protect from scratches and harsh blows To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water or clean in an at home ultrasonic unit Sapphire Sapphires are rated excellent for everyday wear Avoid exposure to heat and contact with chemicals To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water or clean in an at home ultrasonic unit Bloodstone Bloodstone is rated fair for everyday wear Avoid exposure to heat contact with chemicals and protect from scratches and harsh blows To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water or clean in an at home ultrasonic unit Lapis Lapis is rated fair for everyday wear with care Avoid exposure to heat contact with chemicals and protect from scratches and harsh blows To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water Tanzanite Tanzanite is not for everyday wear and one should take care when wearing Avoid exposure to heat and sudden changes in temperature Avoid contact with chemicals To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water Cameo Cameos are quite fragile and are not for everyday wear and special care should be taken wearing Avoid exposure to heat contact with chemicals and protect from scratches and harsh blows To clean wipe gently with a moist cloth Tiger s Eye Tiger s Eye is rated good for everyday wear Avoid exposure to heat and sudden changes in temperature Avoid contact with chemicals To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water or clean in an at home ultrasonic unit Carnelian Carnelian is rated fair for everyday wear Avoid exposure to heat contact with chemicals and protect from scratches and harsh blows To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water or clean in an at home ultrasonic unit Moonstone Moonstone is rated good for everyday wear Avoid exposure to heat contact with chemicals and protect from scratches and harsh blows To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water Topaz Precious Precious Topaz is rated good for everyday wear Avoid direct sunlight and exposure to heat that may cause color to fade Avoid contact with chemicals To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water Chalcedony Blue and Lavender Chalcedony is rated fair for everyday wear Avoid exposure to heat contact with chemicals and protect from scratches and harsh blows To clean gently scrub with a soft toothbrush and a solution of mild dish soap and warm water or clean in an at home ultrasonic unit Onyx

    Original URL path: http://www.truros.ca/truros/resources/caring_for_and_cleaning_your_gem.htm (2014-10-22)
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  • Diamond wedding rings, fine gemstones and other jewelry
    body color and with large and distinct patches of many bright and intense colors that are called Harlequin The more common opal sold today in jewelry stores is the White Opal it cost is lower and you still see this play of color although it lacks the intensity of the black opal with a Harlequin patchwork of bright colors Moonstone This gemstone will show a Phenomenon called Adularescence and can best be described as billowing color that is different from the body color and seems to float across the moonstone It is a very striking effect Moonstone is the only natural gemstone to display adularescence and relatively inexpensive the next time you are looking for an interesting gemstone take a look at this phenomenal stone Value is based on the body color which should be light blue with a bright blue adularescence this is followed in value by a white body color with a blue adularescence and finally by the moonstone with either a grey or white body color Alexandrite This gemstone is know for its dramatic color change which depending on the change in light can change the color of the gemstone from green to brown blue to red and many other combinations While there are other natural gemstones that have color change such as Garnet Sapphire Ruby Spinel this gemstone has come to be known for its dramatic changes and you will sometimes hear the term alexandrite effect The more valuable color change Alexandrite will change colors from green to a purplish red with a medium saturation in both hues If you want a color change gemstone and don t want to pay the prices that Alexandrite command look at a color change garnet its relatively inexpensive and provides a distinct color change for you to see and

    Original URL path: http://www.truros.ca/truros/resources/gemstones_and_phenomena.htm (2014-10-22)
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  • Diamond wedding rings, fine gemstones and other jewelry
    she likes to wear that can help you in deciding what color of gemstone would match her wardrobe especially if its earrings or necklaces Know her skin tone or dominant make up color as different colors of gold look better on different skin tones or make up colours 4 You will need to know the size of her finger if you are purchasing if is to be a surprise present If you can borrow one of the rings she wears you can take it to a jeweller who will be able to tell you the size This way when you purchase your ring you can make sure it will fit correctly and she can wear it immediately 5 If your special person has thin fingers then buy her a wider setting or smaller gemstone as larger gemstones on thin settings will have tendency to twist and turn If you are set on a larger stone then have the jeweller modify the ring with the addition of 2 small spheres of gold soldered at 8 and 4 o clock on the ring shank This will allow the ring to slip over the knuckle but provide a tighter fit around the finger keeping the gemstone on top for everyone to see 6 Earrings are an excellent choice then its important to know if she has pierced ears or prefers clip on mountings Does she like long dangly earrings or does she prefer studs The following information will help you with special occasions and what is traditionally purchased but the most important thing to remember is her tastes in jewellery and color Buying her a Sapphire Ring instead of a Ruby Ring on her birthday in December because she does not like red is the right thing to do tradition has its role

    Original URL path: http://www.truros.ca/truros/resources/buy_jewelry_for_that_someone_special.htm (2014-10-22)
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  • Diamond wedding rings, fine gemstones and other jewelry
    the gemstone authenticated by a gemologist or a reputable grading laboratory like GIA or EGL two of the worlds leading authority on gemstones There are many different ways to synthesize gemstones and as the processes are very technical I will just mention some of them by name only These are Flame Fusion Pulling Floating Zone Skull Melt Flux Growth and Hydrothermal Growth These processes can produce synthetic gemstones such as Ruby Sapphire Spinel Alexandrite Cubic Zirconia Emeralds Amethyst Opal Turquoise Lapis and many others One of the key developments of synthetic Ruby was to accelerate the growth and reduce the cost of components for Lasers Today nearly all ruby lasers use synthetic Ruby These lasers are used in everything from your supermarket scanner to Medical Diagnostic Tools From Synthetic to imitations these can be either man made or other natural gemstones For example Red Spinel can imitate Red Ruby Amethyst can imitate Tanzanite Garnet can imitate Ruby Most people will associate color with a gemstone and make an assumption that if is has a rich red Ruby color it is Ruby In the previous paragraph we discussed how laboratories can product synthetic versions of the real gemstone It is also common to see synthetic gemstones used to imitate other natural gemstones Synthetic Sapphire has been used to imitate Tanzanite by changing its color in the synthesizing process Glass is probably the largest imitator of them all as it can imitate most gemstone colors and is very cheap to produce You will also see a lot of plastics used to imitate Turquoise Malachite Peal Amber Jade etc One other set of imitations are assembled stones these assembled gemstones use combinations of natural and synthetic material to produce the desired effect This process involves making gemstones of 2 or 3 different materials

    Original URL path: http://www.truros.ca/truros/resources/synthetic_gemstones_and_imitations.htm (2014-10-22)
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  • Diamond wedding rings, fine gemstones and other jewelry
    careful when someone offers you a Sapphire using any of these terms make sure that the Sapphire actually came from that source It not unusual for sellers to reference their gemstones as Kashmir Sapphires when they may have come from Thailand or Australia as these do not command the same type of prices Lets take a look at the difference of each term so you will know what questions to ask your seller Kashmir This Sapphire has violetish blue to pure blue hue with a strong saturation you will hear it described as having a velvety lustre and softness this is caused by minute inclusions Kashmir Sapphires are the most prized and the finest quality Sapphires available This Sapphires color has also been called a cornflower blue but that term has been over used to describe many different blues Burmese It is close to the color of the Kashmir above with a subtle difference in the saturation and sometimes a darker tone and could be described as a Royal Blue It differs from the Kashmir as it does not have that velvety lustre Burmese make up the second most desired and finest quality of Sapphires available Ceylon and Sri Lanka have a violetish blue to blue hue but are lighter in tone this will provide the person viewing a gemstone with more sparkle and brilliance than the previous two Sapphires Pailin and Cambodian are a violetish blue to greenish blue in hue this distinctive color is very appealing to a lot of people and you will find it in a large amount of jewelry that is being sold in jewellery stores Australian you will find a lot of these Sapphires in lower cost jewellery as they have a very dark tone and look inky you will hear the term inky

    Original URL path: http://www.truros.ca/truros/resources/blue_sapphires.htm (2014-10-22)
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  • Diamond wedding rings, fine gemstones and other jewelry
    sometimes incorrectly used The term Colombian is used to describe the most valuable and rare color of Emerald bluish green to green with strong or vivid saturation The term Zambian is used to describe Emeralds that have a darker and more bluish color than Colombian and usually have a greater clarity The term Sandawana is used to describe smaller brighter intense green Emeralds that originate in the Sandawana district The term Brazilian is used for Emeralds that are lighter in color and have a low saturation you will see a lot of these available in jewelry stores The above terms can only be used as a guideline as it is possible to find higher quality Emeralds in Brazil or any of the other locations however they are not as readily available in the quantity and quality of the Emeralds from Colombia In your quest for your Emerald you might find your seller calling a bluish Green Emerald that comes from Brazil a Colombian Emerald and that is incorrect Clarity in Emeralds have a greater propensity for inclusion than a lot of other gemstones that are sold or made into Jewelry and flawless Emeralds are very rare and expensive So do not be concerned if you are being shown Emeralds with inclusions as they are very common It is important that the inclusions in the Emerald you are looking at does not distract from its beauty to you The industry and gemologists use the following clarity terms for Emerald inclusions Slightly Moderately or Heavily Included these levels of inclusions characteristics can be best described as following Lightly Include Noticeable inclusions that are apparent to the unaided eye Moderately Included Obvious inclusions very apparent to the unaided eye Heavily Include Obvious and can have a negative effect on the appearance and durability

    Original URL path: http://www.truros.ca/truros/resources/buying_an_emerald.htm (2014-10-22)
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  • Diamond wedding rings, fine gemstones and other jewelry
    you are not looking at a diamond but either a simulant or synthetic diamond While this test will not confirm you have a diamond as there are some simulants and synthetics that have no see through you will be able to eliminate the ones that do show see through Today most jewellers and gemologists use a thermal testing device to tell if the diamond is natural or not The person who is examining the diamond touches it with a probe that is connected to a meter that applies a small amount of heat to the diamond and measures how quickly the heat is drawn away The gauge display usually consisted of a red and green zone If the gauge stays in the green zone it is a diamond it continues moving to the red zone it is a simulant or synthetic diamond There are many other tests that require laboratory equipment to make a determination If you suspect a stone is not what it appears to be take it to a gemologist or send to a gemstone testing laboratory such as GIA Gemological Institute of America or EGL European Gemological Laboratories to have it tested Lets take a look at some of the simulants that are around today and have been around for sometime Glass has been used since the early 1700 s to simulate diamonds and is still used extensively today in fashion jewelry Colored Foil was also used to produce color in glass simulants it was attached to the back of the glass giving the glass color when mounted in rings or pendants Zircon is a colorful or colorless natural gemstone that has been used for many years as a diamond simulant following these we have some more modern simulates such as Synthetic Rutile both of these are

    Original URL path: http://www.truros.ca/truros/resources/diamonds_sparkle_and_display_bri.htm (2014-10-22)
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