Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
Barite occure as concretions in the schist. Dons (1956) writes that some of the barite explode when it's hold in a hand, and fragments from 1mm to 1cm are thrown up to 1m away! The explotions are caused by CO2-gas bubbles under pressure as inclutions in the barite.