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Da Yooper's Guide to

Kona Dolomite

Named after the Kona Hills South of Marquette, Marquette County, Michigan where it is found. Kona Dolomite is a very ancient rock in which Fossil Stromatolite Formations (Blue-Green Algae) from 2.1 to 2.2 Billion Years Old occur. The Fossil Stromatolite Formations were built by some of the first life on earth, and are thought to have changed the atmosphere to allow life as we know it today. Fossil Stromatolite Formations are found in the lower eras of the Middle Precambrian Period. Stromatolites are abundant and are found in many colors and shapes including Domes.

Because of the great age, and due to the many trace minerals present, specimen come in many shades of red, orange, brown, yellow, pink, cream, and often has shades of turquoise, brown, cream, gray and black banding, lacing and mottling. Often they will have inclusions of a dark Red Felsite and this is the only place in the world where that particular color of Red Felsite is found.

Kona Dolomite is not pure Dolomite as Silica is present which shades into Chert and Quartzite. The strata has been subjected to many forces of nature including intense folding, faulting, and shattering which often results in a breccia cemented with Quarts and Hemetite.

Kona, makes beautiful slabs for clocks & wind chimes. Fantastic Spheres, Eggs, and Bookends as well as Carvings, as it carves fairly easily. It will often cut some excellent larger Jewelry cabs for Bolos, Belt Buckles and Pendants and sometimes some smaller cabs for Rings, Earrings and other jewelry projects.

Although, not well known in the Lapidary world it is beginning to come into favor as more Lapidary Craftspeople become aquainted with it. Not many minerals offer the variety of colors, lacing, mottling and inclusions (including the Dark Red Felsite inclusions) or are as easy to tumble, slab and lap. The Clocks, Carvings, Eggs, Spheres and Jewelry Cabs are absolutlely georgous.

Da Yooper has a large supply of rough, from tumble rough to rough over 150 pounds in weight. All rough is hand picked and chosen for color and other special characteristics. We have an Auction Site that specializes in Rocks, Minerals, Fossils and Collectibles. We try to have a nice selection listed on auction at all times.

Da Yooper has received a number of requests for Finished Items, and if any Lapidary craftspeople are interested in working with us to provide the following items on our auction, please contact us.

Drawer Pulls, Tiles, Door Knobs, Boxes, Carvings, Spheres, Eggs, Hearts.


Ready Soon, Order now ,and receive in time to plan a Spring Field Trip.
Da Yooper's, Field Trip Guide to Kona Dolomite
................... $3.00

Da Yooper's Choice tumbled 75 Cents ea. or 3/$2.00.
Each specimen has been hand picked as a beautiful example of this great Lapidary Mineral and the above is a representation of what you will receive.

Da Yooper's Kona Hand Picked Tumble Rough. $5.00 per Pound

Each piece of Kona has been hand picked by us and should be a beautiful specimen when polished.

Da Yooper's Kona Tumble Rough Pit Run. $2.00 per Pound

Below are a few Specimen to give an idea of the colors and variety of Kona Dolomite.
Click on a Picture for a Larger View.

Kona 1 This is a great specimen of a creamy yellow that shades into pinks and greys with dark brown lacing. Measurements are 5" x 5" x 1.7" and weight is 1.5 lbs.

Kona2 Has a creamy yellow background with various colors in a wavy patterns spotted throughout. Vivid black spots provide a startling contrast to the other colors. This beautiful specimen is a 6" x 3.5" x 2.75" triangle and weighs approximately 2 pounds.  
Kona3 Beautiful slab with various shades of pink as a background broken by grey and black Stromatolite Formation bands and some mottling that subdues the Dark Red Felsite inclusions that are available only in Kona Dolomite from Michigan. 4" x 3" x .12" Slab. The color shown is very close to that of the specimen.  

For Information contact Da Yooper

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