October Birthstone Jewelry in Sterling Silver  

Opal and Tourmaline: Two Birthstones for October Birthdays

Opal forms from silica deposits in sedimentary rock, primarily sourced from Australia, Ethiopia, and Mexico. Ethiopian opals tend toward higher water content and more dramatic fire. Australian stones from Lightning Ridge and Coober Pedy remain the industry standard for black and white opal varieties. Each opal displays a different pattern of color flashes based on its internal silica sphere arrangement. Tourmaline belongs to a mineral group with complex boron silicate chemistry, which accounts for its color range. Pink tourmaline from Brazil and rubellite from Madagascar appear frequently in October birthstone pieces. Watermelon tourmaline shows pink centers with green rims, cut in cross-sections to display both colors. Green and blue varieties also qualify as October alternatives for those who prefer cooler tones. SilverRush Style has sold natural stone jewelry since 2005. Every piece ships free within the United States and features .925 sterling silver settings. Browse opal pendants, tourmaline rings, and birthstone earrings to find a gift for October birthdays or a personal addition to your collection.