Stadheim Jewelers - Those born in October have two birthstones; Tourmaline and Opal. Tourmaline is a favorite gemstone for many because it's available in a rainbow of beautiful colors. Opal gemstones are
October Birthstones - Blase DeNatale Jewelers
Sites-rogersandhollands-Site
Opal & Tourmaline: October's Birthstones - Service Jewelry & Repair | Blog
October Birthstone Guide - Opal and Tourmaline | Joseph's Jewelry
Exploring Opal and Tourmaline Birthstone
The Birthstone Bulletin: October's Opal and Tourmaline