Did Someone Say Crypto? I’ve Been Shining for Years

I AM A CRYPTOCRYSTALLINE variety of quartz, made up of a weave of microscopic crystals that allows me to glow with a translucent light. While there are a number of gemstones from carnelian to onyx that have the same structure and hence, in theory, can use my name, mention me to a jeweler and he’ll reach for the good stuff, the “actual” gem that has a history in adornment going back thousands of years. Most recently I was popular with the boho crowd and as a way to wear Pantone’s choice of lavender as their color of the year. Who am I?