Just So Jewellery - Bit late but here is October's birthstones (2 for this month!) Opals have been a favourite gemstone of mine for many years | Facebook
October Birthstones: Opal + Tourmaline – Adornment + Theory
October Birthstones: Pink Tourmaline and Opal - International Gem Society
October Birthstone: Opal Colors, Symbolism & How to Use
What Is The October Birthstone? - Astteria
Tourmaline - The October Birthstone
October Birthstone – Shiels Jewellers
October Birthstone - A Comprehensive Guide on Birthstone for October – Danyal Paraiba