October has two birthstones: opal and tourmaline. Opal shifts color through light diffraction, and tourmaline comes in every color. Together they make October the most visually remarkable month on the birthstone calendar.
Stone Story
Opal's play-of-color sets it apart from every other gemstone. It's the only stone that diffracts white light into a shifting spectral display that changes with movement. It's an actively changing piece, different in every kind of light and from every angle.
Built For Ease
Clutch backs come in sizes calibrated to post gauge and earring weight. Fine jewelry posts run standard gauge so you're usually working with a standard back. Heavier styles, however, have larger comfort-back options that actually hold the weight.