Could be the species, neutral or ionized, indicated by its usual chemical symbol. Vacancies are denoted by V Charming piece of jewellery- perfectly made. Not as well flashy for daytime use but wonderful for evening at the same time. This is one of numerous parts I have obtained from Angara. https://bookmarkshut.com/story18681042/the-definitive-guide-to-natural-yellow-sapphire-from-sri-lanka