This finely polished 16.2 carat fire agate gemstone showcases a vivid interplay of red, orange and green hues with good refraction iridescence. The gem measures 24.95 mm by 19.70 mm by 6.28 mm at its widest points and is 100% natural and untreated, making it a good choice for use in a high quality jewelry creation or as a colorful gemstone specimen display.
The vibrant colors in fire agates result from the Schiller effect, like that seen in mother-of-pearl and opals. This phenomenon arises from alternating layers of silica and iron oxide that diffract light, creating the interference colors recognized as fire. Optimal lighting is essential to reveal the gem’s full fire display, as in dimmer conditions the stone will tend to appear darker and more brownish in color.
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