‘Empress of Uruguay’ At 2500 tons & about 11 ft. tall, she’s the largest amethyst geode (or any geode) we know of. She now belongs to collectors, René and Nelleke Boissevain who show her off in Queensland, Australia.
Kakortokite - a rare intrusive igneous rock of variable composition occurring in Greenland - a mixture of nepheline syenite (white), arfvedsonite (black), amphibole (red), also occasionlly sodalite and rinkite
As a chemist, this is the most pure specimen of gold I have even set my eyes on. I spent a year measuring the purity of gold for the treasury, and I must say that I have never seen a specimen of such beauty and purity.