The September birthstone is the gemstone sapphire. It is also the gemstone associated with the Zodiac sign Virgo. One of the most popular of the precious gemstones, blue is the most sought after Sapphire colour. Sapphire is synonymous with truth and wisdom. A beautiful and stylish stone, our ethically sourced Sapphire gemstones make beautiful necklaces, earrings, studs and bangles. Discover the power of the September birthstone sapphire.