The Great Formation
The formation story of Great Lake stones feels like a mystical legend. It's hard to imagine ancient lava flowing through a notoriously frigid and snowy part of North America. However, around the time of continental formation, roughly 100 million years ago, the shifting of the continental plates caused molten lava to erupt.
The three main Lake Superior stones we work with are Lake Superior Agate, Copper Replacement Agate, and Michigan Greenstone. Each variety was formed by varying cooling scenarios of the lava and different mineral depositions. Sounds like the stuff of legends, eh? It's true!
When lava hardens into rock, gasses trapped inside escape, leaving holes in the rock. Over time, these holes are filled with various minerals and additional lava, forming Great Lakes gemstones!
Journey From Beach to Jewelry
Understanding that these gorgeous natural beauties are over 100 million years old adds even more wonder to their splendor. Rock and agate hunting is not an uncommon hobby where we live in Michigan's Upper Peninsula. No two stones look exactly alike and each is exhilarating to find and beautiful in their own way.
Lake Superior Agate
Most of our stones come from a couple of dedicated rock hounds up in the Keweenaw Peninsula who have made Lake Superior Gemstones their livelihood. They find and prepare each stone for its placement into a Beth Millner original design.
We do have a variety of Lake Superior Agates that were found and cut by Beth herself. Some were sourced from beaches right here in Marquette, Michigan, while others were found during her travels around the Lake Superior region. You can check out our Marquette Agates here.
Greenstones are the official gemstone of Michigan! This stone is also known as Chlorastrolite and is typically found on the beaches of Copper Country. Larger pieces are extremely hard to come by, we are lucky to be able to get our hands on some! It's known for its deep green hues and crystalline structures within that form the signature turtleback pattern.
Copper Replacement Agate
Since Michigan's Upper Peninsula is graced with an abundance of copper, the treasures that are copper banded agates can occasionally be found throughout the region. These rare beauties contain signature streaks and sections of copper throughout.
Turning Gemstones Into Jewelry
Beth often designs jewelry based on the stones themselves. Many of the designs feature trees springing from stones or as a part of rocky landscapes. Below, you can see some of her recent Lake Superior Agate designs!
Whether you find them on the beach or on our shelves, the beauty and wonder of Great Lakes Stones is absolutely amazing. Stay updated with all news and new jewelry on our Facebook and Instagram pages.
Learn more about the Gemstones we work with.
Let customers speak for us1945 reviews
Beautifully designed! Love these pieces of art!
My wife loved it. We are from Kalamazoo area but love Marquette
Surprised at the quality of leather it is like saddle leather very well made will last forever. Simple piece that screams quality
My wife loves the necklace. She says she wishes there were more wildflowers pendants similar to this piece. Craftsmanship is exceptional!
Souse loved it
Love this pendant. I decided to wear this piece on my vacation. I received many compliments and spread the word about BMJ! Nina did a fantastic job designing this piece. Very happy I purchased it. BMJ is a great company with talented and caring employees.
Made the perfect Mother’s Day gift! The pendant itself is a beautiful work of art, particularly as the colors in the stone seem to change. Brings back great memories of watching the northern lights in Upper Michigan.
For those who have experienced the northern lights, you know how fleeting they are. This pendent allows you to capture those special moments as the lights dance across the northern sky. It’s a beautiful piece of jewelry.
This sunflower is a cheerful addition to a cloudy gloomy day. I wear it often during the winter. It is one of my favorites. Having a firebrick center is unique.
I received my Spring Cat Tails oval pendant and I love it. It is finished beautifully and I especially love the touches of copper.