Brown Opal Specimens.
Origin: Brazil
Size: approx. 4-6 cm
SET OF 24 UNITS
Brown opal is a common variety of opal that stands out for its earthy tones, ranging from deep chocolate to soft cinnamon, and unlike noble opal, it does not usually display the characteristic play of colors or iridescence. It is formed by the sedimentation of hydrated silica in cavities in volcanic or sedimentary rocks. It is valued by collectors for its resinous luster and its ability to display unique natural patterns. It is a more resistant and affordable stone than the precious varieties, ideal for making cabochons and ornamental elements that convey a natural and sober aesthetic.
