Little Gem Girl Antique Copper Mexican Opal Dragons Breath Fire Glass Amulet Pendant Color Shifting Necklace Mexican Fire Opal Dragon's Breath glass cabachon - Colors shift from lightening strikes of blues to scarlet red depending on how the light hits it The flashes of color from within the stone are known as the "breath" from which the name is derived. Mexican Opals were first used in jewelry in the early 1900s to simulate fire/jelly opals. Highly collectible and rare  this lovely stone is a certain conversation piece and will become a cherished favorite. Glass cabochon is oval shaped and approximately 18x25mm Vintage style necklace pendant 1 inch x 1.5 inches with 24 inch link chain necklace chain Comes with an organza bag - ready for gift giving! Handcrafted in the USA by Little Gem Girl - a small handmade business!