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Lighting and Gem Color
Color is arguably the most important feature of colored gemstones. But the color of any material is due to the nature of light itself. Daylight, or white light, is a mixture of all the different colors of light in the spectrum. When white light shines on a solid material, part of the spectrum of light is absorbed, while the remainder is reflected back to the eye. For example, a ruby looks red because the material absorbs all the other colors of white light except for red. The perceived color of any gemstone is thus dependent upon the light in which it is seen. So when buying gems there are a few tricks of the trade that can be employed to help judge the true color of a stone. The first rule of thumb is to examine a gem in natural light. Flaws can be seen more clearly and, most importantly, the true color and brilliance of the gem can be discerned. It is always a good idea to examine a gemstone in varying light. But a gemstone should always be seen in natural light first. However, not all natural light is the same. In general, skylight - as opposed to direct sunlight - is preferable because it produces less glare. Geographical latitude can also affect the color of a gemstone, since skylight is usually stronger in the tropics than at higher latitudes. So a stone purchased in Thailand may appear slightly, yet noticeably, lighter once transported to a temperate country. The intensity of skylight also changes throughout the day. Stones with reddish hues, such as rubies, look best during the middle of the day while sapphires and other gems with bluish tones are enhanced by the light in the early morning or late afternoon. Heavily-polluted or overcast skies also make the skylight more grayish than blue, which may improve the appearance of red gems whilst detracting from blue ones. To avoid disappointment, purchases should be made at a time when the stone is not in its ideal light. 
Ruby on a Brass Background
Another factor that may affect the appearance of color is the color of the background on which the gem is displayed. In Thailand and Burma, rubies are traditionally offered for inspection on brass plates or yellow table tops. Using yellow as the background color offsets the bluish tint that is often noticeable in ruby and makes the gemstones appear redder. Sometimes gemstone parcel paper is lined with yellow cellophane, or brass tweezers are used for the same reason. A plain white background is usually best for judging color.
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Overall Rating -> 10 Purchase process is easy. Make the selection online and pay for it. About a week to 10 days later the stone shows up. Very easy and on time. Posted By Brien in October, 2022 Source: Bizrate Overall Rating -> 10 Another great purchase. I just received my 3rd order and have another coming soon. Won't buy anywhere else! Posted By Beth P. in June, 2022 Source: Bizrate Overall Rating -> 10 Great selection that I couldn't find locally and very good and prompt shipping and delivery via Fedex. Posted By Gala in January, 2023 Source: Bizrate Overall Rating -> 10 Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however. Posted By David W in May, 2023 Source: Bizrate Overall Rating -> 10 I particularly like information about product provided with purchase. Posted By Dick in May, 2023 Source: Bizrate Overall Rating -> 9 Have just ordered a couple birthstones, hopefully correct size for the setting. Excited to see! Posted By Ellymae in March, 2023 Source: Bizrate Overall Rating -> 10 I really like how many options there are and the fact that each stone has multiple photos and clearly explains where they came from and their size and quality Posted By Shaberu in December, 2022 Source: Bizrate Related Articles Color Basics Gemstone Color - Gemstone Information - GemSelect ... Pink Gemstones for Jewelry Pink Gemstones for Jewelry, Shop Pastel Pink to Hot Pink Gems ... Topaz Colors Topaz Colors - Brighten your world with a rainbow ... Gem Color Saturation Gem Color Saturation ... Color Zoning in Gemstones Color Zoning in Gemstones ... Green Gemstones Green Gemstones - A Complete Guide for Green Stones ... Red Gems for Jewelry Buying Red Gemstones for Jewelry ... White Gems for Jewelry White Colorless Gems for Jewelry ... |
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Size and Weight
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Gems are always measured in Millimeter (mm) Dimensions are given as; Select gems by size, not by weight! Note: 1ct = 0.2g  |
