Great Lakes Stones at Beth Millner Jewelry

Great Lakes Stones at Beth Millner Jewelry

May 11, 2018

Great Lakes Stones at Beth Millner Jewelry

The Great Formation 

The formation story of Great Lakes stones feels like a mystical legend. It's hard to imagine ancient lava flowing through the lands of North America that we now know to be notoriously frigid and snowy. 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 Agates, U.P. Thomsonite, and Michigan Greenstones. 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 the coveted stones Great Lakes gemstones. Below is a unique selection of Lake Superior agates. Notice how much they vary from one another.

Lake Superior Stones And Agates in Beth Millner Jewelry

Journey From Beach to Shop

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 look exactly alike and each are exhilarating to find and beautiful in their own way.

All of our stones come from a couple of dedicated rock hounds up in the Keewenaw Peninsula who have made Lake Superior rocks their livelihood. They find and prepare each stone for its placement into a Beth Millner original design. Some Michigan Greenstone designs can be seen below. 

Greenstones are the official gemstone of Michigan! It is also known as Chlorastrolite and is typically found in small pebbles on the beaches of the copper country. Larger pieces are extremely hard to come by, we are incredibly lucky to get our hands on some! It's known for its deep green hues and crystalline structures within that form the signature turtleback pattern.  

Michigan Greenstones in Beth Millner Jewelry

Turning Gemstones Into Jewelry 

Beth often designs jewelry based off the stones themselves. In her most recent collection of Landscape wonderland pendants, she created a mixed metal landscape to flow with the lines naturally found in the stones. Below is a shot of the pendants before the stones were placed into their bezels.

Mixed MetalLake Superior Agate Wonderland Pendants

For the canopy series, she crafted up whimsical tree designs that appear to grow from their U.P. Thomsonite roots. U.P. Thomsonite is known for its pinkish hue and eye patterning. 


Some geological spectacles come through and Beth can't help but simply build them a recycled metal pedestal to display their radiance. These Copper Banded Agate Pendants are a fine example. As previously discussed, throughout agate formation there is a process of gasses creating hollow cavities within stones and various minerals filling those cavities over time.

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. 

Lake Superior Copper Agates in Beth Millner Jewelry

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. 


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Ring Sizing

Purchase this ring sizer to help determine your ring size. This sizing tool is most accurate for double band rings and bands 6mm and under.

Fingers can change size due to many circumstances. The best way to get an accurate size is to check the size a couple of different times throughout a several day period to determine your best size. The majority of our rings can be resized, but if the ring has a stone setting other than a diamond, it probably cannot be resized unless otherwise noted in the item listing.

Some of our rings with stones are shown with the stone not set in order for us to size the ring to your specifications and set the stone afterwards. This avoids damage to the stone during sizing. Reference the individual ring listings for more details. Wide Bands 7mm and above have more friction against the finger and will need to be ordered a little larger.

Our double band rings fit like a narrow band. When getting sized for a double band ring, you can get sized for a ring that is narrow.

When getting your finger sized, inform jeweler of the width band you are intending on purchasing and rely on them to determine your ring size.

If you need a ring resized that you have already purchased please contact us. 

Engagement Ring Sizing

Purchase this ring sizer to help determine your ring size. This sizing tool is most accurate for double band rings and bands 6mm and under.

There are many sneaky options for getting the size right but the best way is to have their finger sized by a professional.

You may be able to sneak one of their rings and bring it into a jewelry store and ask them to check the size.

Beth Millner Jewelry has wish lists too, so they could come in to the store and fill out a wish list and we will try to get their ring size written down.

Bracelet & Cuff Sizing

Measure wrist circumference. Take your measurement just above the wrist above bone.

Use the chart below to determine the correct size.

The bracelets we make are designed to fit comfortably, but if a looser fit is preferred, the next size up may be suitable.


Beth Millner Jewelry Bracelet Sizing Beth Millner Jewelry Bracelet Sizing


Size Wrist Measurement (Inches) Wrist Measurement (cm)
Small 5.5-6 14-15
Medium 6-6.5 15-16.5
Large 6.5-7 16.5-18
X-Large 7-7.5 18-19
XX-Large 7.5-8 19-20.5
Bangle Sizing

Bangle Size is determined by hand size, rather than wrist size

Measure hand size by tucking your thumb in, just like when trying on a bangle. Measure around the thickest part of the hand while in this position.

Use the chart below to determine the correct bangle size.

Bangle Bracelet Sizing Beth Millner Jewelry Bangle Bracelet Sizing Beth Millner Jewelry
Size Hand Measurement (inches) Hand Measurement (cm)
Small 7-8 18-20
Medium 8-9 20-23
Large 9-9.5 23-24
Pendant & Earring Sizing

When determining the size of pendant or earrings you would like to purchase, please reference the item description which includes the size of the piece.

Also, there will be an image with a hand in the picture to help visualize the size.

When choosing a piece for another person, we find that our customers choose pieces that are similar to their overall stature.

People that are shorter and small tend to like smaller items, tall slender people tend to like our longer larger pieces.

Chain Length

When picking out a chain, 18 inch is the most common length.

This would cause the pendant to sit between the collar bones.

Beth Millner Jewelry chain length