The fascinating Fossheim Steinsenter combines an impressive selection of rare and beautiful rocks, minerals, fossils, gems and jewellery for sale, and a large museum of geological specimens from all over Norway and the world; don't miss the downstairs fossil exhibition. The knowledgeable owners of the centre are especially proud of the Norwegian national stone, thulite. It was discovered in 1820 and is now quarried in Lom; the reddish colour is derived from traces of manganese.