90% of the land mass in Greenland is covered with a 3000 meter ice cap. That's over one mile thick. It is said that once you have seen the world, there is always Greenland. Population 56,901 and they are always cold. They only have a short window in the summer in which to hunt for rocks. The conditions can be brutal, but the coastlines are supposedly breathtaking. Now days they take helicopters up to the top of the slopes to search for the valuable red Tugtupite that is found nowhere else in the world. But there are other fascinating minerals there, including Nuummite, one of the oldest rocks on the planet dating back 2.5 billion years. As well as a form of Sodalite called Hackmanite. Hackmanite is a good demonstration of tenebrescence. A phenomenon in which the mineral changes its natural color after exposure to UV light. Here the mineral is basically white and then turns purple. The purple fades with exposure to natural light with varying degrees. This process can be repeated over and over. Thanks to Mark for helping me with incomplete identification where possible.