Datolite Nodule Mineral Specimen - 28g

This specimen is a datolite nodule that has been cut in half and polished, revealing its translucent internal structure. Datolite nodules of this type are classically associated with Michigan, particularly the Lake Superior copper district, and are considered a hallmark material of the region. While datolite as a mineral occurs elsewhere, well-formed nodules suitable for cutting and polishing are predominantly known from Michigan, making these specimens especially collectible.

The polished interior exposes a translucent light pink to cream colored solid datolite filling the nodule, allowing light to pass through and highlighting internal growth features formed during late-stage hydrothermal activity in basaltic host rocks. The exterior retains the natural nodule shape, providing a clear contrast between the raw outer surface and the finished interior.

Datolite was named in the early 19th century from the Greek “dateomai,” meaning “to divide,” referencing the mineral’s granular structure and tendency to separate along internal features. This specimen offers both regional significance and educational value.

34x29x19mm

28g