The bull case for Tanzanites: - It is sourced from a single small deposit in the Mererani Hills near Mount Kilimanjaro in Tanzania. No other commercially viable sources exist anywhere on Earth, making it roughly 1000x (heh) rarer than diamond. - Primary mines are depleting quickly, 10-25 years left of supply - The stone features a rare trichroic quality that allows it to shift between vibrant blue and violet colors depending on the viewing angle. If you’ve never seen one in person, they can quite literally contain galaxies. - The current market for tanzanite remains relatively small, yet it has substantial upside as awareness grows and the scarcity story takes hold among serious participants. - Discerning collectors (such as myself) have begun quietly accumulating top tier stones. Bought this one 2 years ago for 9800 now worth maybe ~18-30k depending.