"Mexican fire opal comes to us with a variety of characteristics. Yellow to deep orange body color with the very unusual hues moving into the reds. Like opal from other parts of the world, Mexican fire opal can display full-spectrum play of color. This month’s phenomenal featured stone has all the components of a top notch collector’s gem.
As we look internally, we find another visually stimulating characteristic. Stalagmite and stalactite formations occur within fire opal and are usually composed of goethite rods encrusted in limonite. There also seems to be some hematite crystals inside.”