Color Changing

The precious stones that showed unusual optical effects known as phenomenal gems.

These effects include chatoyancy (cat's eye effect), (asterism the effect of stars), (adularescence brilliant effect, as in the stone of the moon), the play of color (as in the opal) and iridescent (like the colors of the rainbow, as in the labradorite). These remarkable phenomena have been known for centuries, and jewelry exhibit these characteristics are especially valuable.

But, More recently, another optical effect that has attracted much attention in the market - the color change. These are the gemstones that display colors different from according to changes of light, usually displaying a different color in the light of incandscent that appears under natural or fluorescent light.

The most famous of these is the rare and expensive alexandrite, a variety of chrysoberyl. But the maroon color change and color-change sapphires have appeared on the market that are equally dramatic color changes.

The color change sapphire, for example, showcases a range of different changes color, ranging from pink / purple to green / violet. Changes bronze maroon change in daylight to a rose pink under incandescent light.

Why is that only a precious few, as some natural sapphires, show these dramatic color changes, since almost all colored gemstones depends on the nature of enlightenment? The answer is that these gems change color two windows of roughly equal size of transmission. A red gemstone is colored red because it absorbs all frequencies of light except for red. A gemstone which absorbs blue and red light appears when the blue light is rich in blue wavelengths (eg fluorescent light) and red when the light is rich in red wavelengths (eg fluorescent light).

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GemSelect is a leading online dealer in fine gemstones, specializing in sapphire, spinel, tourmaline and zircon. Fine Gemstones

Article Source: ArticlesBase.com - Color Change Gemstones

Color Changing

Color Changing