Gemstones Found in Michigan

List of Gemstones Found in Michigan

Michigan is a treasure trove of natural wonders, some of which you would not anticipate! In Michigan, you may discover a wide selection of various gemstones, including amethysts, quartz crystals, sapphires, and other varieties. But what about the out of ordinary?

Other gems discovered in Michigan include sphalerite (a form of zinc ore), fluorite (commonly known as fluorspar), and vanadinite, which are less well-known. These stones are ideal for collectors and anybody looking to add something unique to their jewelry collection.

Michigan has 83 counties, although it is still considered a tiny state in the Midwest due to its modest size. Michigan is home to a variety of gemstones that many people are unaware of! Here are a few of my favorite finds from Michigan State University.

In Michigan, Where Can You Go Rock Hunting?

From a geological standpoint, Michigan is a very affluent state to live in. Rock seekers may uncover intriguing things all over the place, but the Upper Peninsula is particularly rich with opportunities. Even a casual stroll down one of Lake Michigan’s shores may turn into a treasure-hunting expedition.

This state is home to a diverse collection of rocks, gemstones, crystals, and fossils of various sorts. There are several Michigan attractions to choose from, whether you are going on a rockhounding excursion or just visiting with the family.

It is also possible to find glass fragments scattered on the beaches that have been naturally crushed and polished, which you may use to enhance your rock collection.

1. Chlorastrolite:


The official gemstone of Michigan is chlorastrolite. These stones, typically pebble-sized and bluish-green with a star pattern of crystals that resembles a turtle’s shell, are most commonly discovered along the Great Lakes beaches and are particularly frequent in Isle Royale National Park. 

This stone, which is also known as greenstone, is a form of the mineral pumpellyite. Color variations in chlorastrolite pebbles are common because they include other minerals that give them their distinctive color, such as the pinkish tones of thomsonite.

2. Hematite:


Hematite is an ore that is reddish black or black in its natural form but is commonly a lustrous black when polished into a gemstone. Hematite is a type of iron ore that is used to make steel. 

The stones may be found in ancient mine sites in Michigan and along the beaches of Lake Superior, which attracts a lot of attention from treasure hunters. Even though many local collectors may find them appealing, most of the stones discovered in Michigan are inappropriate for polishing.

3. Isle Royale:

Isle Royale
Isle Royale

Isle Royale, located in Keweenaw County, is another location worth visiting for rockhounds. This is the location where you may discover the chlorastrolite, also known as the Isle Royale Greenstone, Michigan’s state gemstone.

However, because the region is part of the Isle Royale National Park, it is not permitted to gather gemstones in this area.

Fortunately, chlorastrolite may be found in plenty in Keweenaw’s mine dumps, which can be found in most of them. The Central Mine, which is located near Calumet, is a good source of high-quality specimens.

Even though you cannot excavate or harvest rocks from this location, it is nevertheless worth seeing. Hiking, paddling, and viewing the animals are just a few of the activities available on this island. Isle Royale is closed to tourists during the winter period due to the terrible weather conditions.

4. Agates from Lake Superior:

Agates from Lake Superior
Agates from Lake Superior

Lake Superior agates are stunningly banded rocks that have delicate coatings of iron-rich minerals between the bands. Typically, stones are found with light colors, like whites, reds, creams, and oranges.

These agates, which are unique to the northwest, are created due to cooling lava eruptions. The vivid reds and burned oranges that are characteristic of the region are due to the high iron concentration of the soil. You’ll find them right along the coasts of Lake Superior, where the flow transports them once they’ve cooled down.

Muskellunge State Park and Whitefish Point, in particular, are excellent places for prospectors to visit. The yearly Rock on Lake Superior Agate Celebration, which celebrates the banded beauty, is held at the previous location.

Lake Superior Agates are mostly used for their aesthetic qualities. They may be found in a variety of jewelry items and sculptures made in the area.

5. Gypsum:


Michigan is the leading producer of yellowish sulfate mineral gypsum in the United States, with a total production of 1.2 million tons in 2015. Gypsum may be discovered in glacial deposits as well as the Michigan Basin in the state of Michigan.

The mineral has a Mohs hardness of 1.5 – 2.0, which indicates that it is quite soft. As a result, it is an excellent chalk substitute—another of its widely used applications in various plasters.

The term “plaster” is derived from the Greek word “gypsos,” which translates as “plasterboard.” Dehydrated Gypsum is the primary ingredient in the well-known “Plaster of Paris.”

Even though Gypsum is typically yellow and hazy in appearance, it may take on a variety of colors and textures depending on minor impurities. Cupro-nickel will give it a greener tint. In contrast, iron would give it a reddish-pink color.

6. Limestone:


Michigan is the major limestone supplier in the United States, second only to Gypsum in production. The state’s Rogers City is home to the world’s largest rock quarry. Quantities of the mineral, and its mines, can be found along the coasts of Lake Huron.

Limestone is a kind of calcium carbonate that has crystallized. It is quickly degraded by acid rain, resulting in the release of carbon dioxide. This may result in stunning tunnels and canyons, although it might be difficult at times.

Limestone is used in a variety of applications. In addition to being an antacid, it may also be used as a whitening ingredient in toothpaste and bath salts. In the industrial sector, it is found in a variety of building materials.


The gemstones discovered in Michigan may make a stunning addition to your jewelry collection, and they are reasonably priced. It is possible to locate something that will suit your preferences among the various hues and shapes available to you.

We hope you liked learning more about these gemstones, and if you’re searching for a unique present to give someone, these could be some wonderful possibilities!

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