Datolite, Centennial Mine #1/#2, Lake Superior Copper District, Houghton County, Michigan, ex. Louis Lafayette Collection #885, Small Cabinet, 5.4 x 6.0 x 7.0cm, $200. Online July 20.
Exceptionally rich green and creamy white datolite from the copper country. Specimen is in a "raw" condition but this would be extraordinarily beautiful if polished.