Nice! The name was a combination of several factors. People's cultural attachment to the stone was an angle: The fact that this is the most popular gem, known to bring tranquility to the holder, and quirky stories (for instance, the greeks thought it protected them from getting drunk) was a fitting symbol for a social network app. I also did part of my PhD in ab-initio light simulations through crystalline systems to find out that Amethyst's color comes from impurities and not from the dominant compounds of an otherwise relatively simple quartz structure (silica and oxygen), which was also fitting for a social network. The impurities are the people, the structure is Nostr.