Kona Dolomite

Also purchased as a slab from the lapidary studio - Kona Dolomite.

These pieces were cut at the studio and faceted and polished by hand at home.  I still have work to do on some of the pieces. (the piece in the upper left is from a core sample and not kona dolomite)

The slab from the studio looks like Jupiter.  I purchased some other pieces online, which have more of a pink base with finer marbling, as shown in the cut but unpolished teardrop shapes below. Also in the teardrop is a piece of amygdaloidal basalt in the lower left.

I still have a lot of rough left and look forward to making more of these pieces in the future.

Named after the Kona Hills south of Marquette County, Michigan where it is found. Kona Dolomite is an ancient rock in which formations of fossil stromatolite (blue-green algae) occur. The stone is between 2.1 to 2.2 billion years old. These stromatolite formations are from some of the first life on earth. These fossil formations are found in the lower eras of the Middle Precambrian Period.

Because of the great age, and due to the many trace minerals present, kona dolomite can be found in a wide variety of shades including pink, brown, yellow, cream, red and orange with shades of brown, cream, gray and black mottling, banding and lacing.