In the bright sunlight, the gemstone has a green or blue tint. A red gemstone appears red … Only recently has the color change Fluorite come on to the market and most of it is irradiated to induce the color change. Color change gems show different colors when viewed under different light sources, such as sunlight and indoor light.The alexandrite variety displays a color change (alexandrite effect) dependent upon the nature of ambient lighting. Alexandrites are actual color-changing stones, not to be confused with the more common mood rings.
But there is a rare color change fluorite from Brazil that changes color from a topaz-like blue in natural light to an amethyst-like purple in incandescent light. Color change sapphire exhibits a range of different color changes, ranging from pink/purple to green/purple.
Beneath artificial light, however, it takes on quite a different appearance when it changes to shades of deep red and purple. So why is it that only a few gemstones exhibit these dramatic color changes since nearly all gemstone color depends on the nature of the illumination?
It is commonly a blue gemstone that changes color to a purple
However, it has fairly good hardness (7 to 7.5 …
The answer is that these color change gems have two, approximately equal-sized transmission windows. This affordable and attractive stone is actually relatively soft which means that it is best used for pendants, earrings, and bracelets, where it is exposed to limited wear. Iolite has distinct cleavage making it susceptible to chipping or cracking if struck with force. It is a highly brilliant stone that occurs in blue-purple shades, but due to its abundance, it is not highly valued. Diaspore is a recent find in Turkey that displays a more subtle color change, from a light-green or golden in natural light to a pinkish brown in low light conditions such as candelight.
Color-changing fluorite is most often found as a blue stone under natural light that turns to a purple stone under incandescent lighting. Alexandrite Color Change Alexandrite is a gemstone originally mined from the Ural Mountains deep in Russia. Alexandrites display a spectrum of colors, usually changing from green to blue in the daytime to pink, purple or red at night. If you’re lucky enough to find a color-changing Andesine, you’ll observe a shift of colors between a deep green to a bright purple. Alexandrite effect is the phenomenon of an observed color change from greenish to reddish with a change in source illumination. Although iolites are highly sought-after gemstones, they are quite stunning and can rival the beauty of more expensive blue stones such as sapphire or tanzanite. Fluorite.
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