M & W Minerals
Walter R. Kellogg
517 294 6709
Lake Mine, Mass City, Ontonagon County, Michigan, USA
4.3 x 3.8 x 0.9 cm
$35 Click here to order this mineral.
This polished Datolite nodule has a purplish/gray interior. Around the edges of this darker interior are very small spots of red which gives it a pink hue in places. The Lake Mine operated from 1909 until 1919 and produced 7.3 million lbs.of copper.