This mid-quality Aguascalientes fire agate gemstone measures 18.30 mm by 13.28 mm by 8.38 mm and weighs 15.3 carats. It features a small bubble style fire display with green, gold and blue colors. This gem needs strong lighting for best fire display and has a darker brownish hue in low light conditions. This polished stone is ready for final setting or display in a gemstone collection.
This fire agate gemstone comes from the Calvillo fire agate (Agata De Fuego) mines located in Aguascalientes, Mexico. Renowned for their high quality, these mines yield fire agates exhibiting a diverse range of rainbow colors, including reds, greens, purples, and blues.
The photographs shown highlight the stone’s color and formation under both artificial full spectrum indoor lighting and natural sunlight to best display its internal fire layers. The vibrant colors within fire agates arise from the Schiller effect, like what is seen in mother-of-pearl and opals. This phenomenon results from alternating layers of silica and iron oxide that diffract light, creating the interference patterns known as fire. Optimal lighting enhances this color play while in dimmer conditions the colors will be less vivid and the stone will appear darker with a brownish hue.
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