This necklace showcases Mexican Fire Opal gemstones in a stunning sky-blue hue, accentuated by a beautiful 18k vermeil Filigree melon-shaped bead and a gold vermeil toggle clasp. Known for their captivating appearance, Mexican fire opals are primarily found in Mexico but can also be discovered in Guatemala, Honduras, the U.S., and Australia. In fact, Germany is a major consumer of Mexico's prized fire opals.