Allow me to make the case for why calcite should not only earn your vote but win the tournament. Calcite is the mineral with the most forms, is highly fluorescent & phosphorescent, helped explain the wave nature of light, laid the foundation for optics/polarizers, and even calms an upset tummy. A 🧵:
#MinCup26 Round 1 Match 11 It's a pair of minerals that pull off near-magical tricks with their properties as ubiquitous #Calcite is up against rarity #Julienite. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...