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Fire Agate Rough Calvillo Aguascalientes Mexico Gemstone Specimen MCR056
Fire Agate Rough Calvillo Aguascalientes Mexico Gemstone Specimen MCR056
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This colorful piece of Mexican fire agate rough measures 47.7 x 34.3 x 16.0 mm and weighs 24.63 grams (123 carats). This stone has visible fire layers exposed and displays green, orange, red and golden bronze colors. This fire agate (Agata De Fuego as they are called in Spanish) is from the Calvillo, Aguascalientes, Mexico area which is well known for producing quality fire agates with bright colors and mixed color variations.
Photographs were taken indoors under artificial full spectrum lighting and outdoors in natural sunlight, with the stone shown dry and wet to mimic a polished and enhance the visibility of its internal fire. Close-up magnification photos are also included to better reveal the intricate fire layers and colors within the stone. The colors seen within fire agates are created by the Schiller effect, as found in mother-of-pearl and opals. It is caused by the alternating silica and iron oxide layers which diffract and allow light to pass which forms the interference of colors known as fire. This play of color requires good lighting for the best fire display and will appear a darker brownish color in lower light conditions.
This stone is a natural rock and is subject to the normal flaws found in nature or the result of the hard-rock mining extraction process.
Photographs Copyright © 2025-2026 Maricopa Mining LLC. All Rights Reserved.
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Aquascalientes Mexican Fire Agates
Aguascalientes, Mexico has become a respected and increasingly sought after source of Agata de Fuego, known for its distinctive character, strong color development and excellent lapidary potential. The fire agate rough from this region, particularly from the mining areas around Calvillo, often displays bold, well defined fire layers that respond beautifully to careful shaping and polishing. Many pieces show vibrant flashes of red, orange, green, and purple, with a depth and movement that make Aguascalientes material especially rewarding for carvers who enjoy working with stones that reveal their beauty gradually as each layer is exposed.
Much of the finest rough comes from the El Negrita mine in El Terrero de la Labor, a locality recognized for its dark black chalcedony, which provides dramatic contrast against the internal fire. This darker base often enhances the saturation of the colors, giving finished gemstones a rich, high‑impact appearance. For lapidarist, this means the potential for high dome cabochons, freeform carvings and deeply sculpted pieces with strong visual intensity and crisp fire windows.
These fire agate mines sit within the rugged Sierra Fría and Sierra del Laurel mountain ranges of Aguascalientes, regions known for their volcanic history and mineral rich geology. The unique conditions in these mountains helped create fire agates with complex botryoidal structures and layered fire patterns that lend themselves to both traditional cabbing and more advanced sculptural carving techniques. With patience and precision, Aguascalientes rough can yield gemstones that showcase swirling, multidimensional fire, each one a one‑of‑a‑kind piece of natural art.