Datolite specimen from the historic Nasa Mine in Grant Township, Keweenaw County, Michigan. This classic Michigan datolite displays the characteristic pale pink to white coloration and crystalline structure prized by collectors. Measuring 5 x 1 x 3.5 cm, this piece represents quality material from one of North America's most productive mineral localities. A fine addition to any mineral collection, particularly for those focused on Michigan specimens or classic American mineral occurrences.
