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M & W Minerals

Walter R. Kellogg


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Mineral Specimen #6890    Polished Datolite Pair

Lake Superior lakebed, Keweenaw Co., Michigan

7.0 x 5.9 x 2.6
and 7.4 x 5.7 x 2.7 cm


Ex. Roland and Doris Snyder from Rich Whiteman, 1980s

This polished Datolite has a unique smokey yellow color with a slight hint of peach. The color is difficult to capture in a picture. There is additionally a vein across the middle which varies from a dark red to burgundy in color. The polish is very good and glass like. Overall, an extradionary specimen.

The specimen is from the lakebed of Lake Superior, where due to being within the boundaries of Isle Royale National Park, collecting was only legal for a short period of 16 years. A court case in 1981 paved the way for collecting. The gist of the case was the mineral rights were never ceded over to the Park Service and were still owned by the state of Michigan where it is legal to recover items from the lakebed which is considered part of public lands. Later, the mineral rights extending 4 1/2 miles from the shores of the island were ceded over to the Park service and collecting was once again illegal. During the 16 years, a great many Datolite nodules were recovered by scuba divers, this being one of them. Such specimens are called Lakers and often have a lighter, bleached rind such as this specimen.

The Snyder collection was very likely the best Datolite collection in private hands. Specimens from the collection were often displayed at local shows in the Detroit area. A very large Laker specimen from the collection was recently donated to the Seaman Museum and is considered the finest one of its kind.

Condition: Excellent

Flaws: Nothing Appreciable

This mineral is also found in the following galleries: Minerals From Michigan | Nesosilicates | Polished & Worked | Minerals Priced Between 300 and 499 Dollars