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Greystone Mining, LLC was established by Keith Griesbach in 2020 to address the dimensional limestone quarrying needs of Door County and the Mid-Western United States. This exceptionally hard and high-quality limestone features a cool grey color with blue and white hues. Stone is available in a variety of sizes for uses that range from decorative natural landscaping and building to shoreline rip-rap and erosion control.





These high-quality dimensional limestone outcroppings are geological formations of limestone that exhibit exceptional qualities and are used in numerous construction and architectural applications.

The high quality of the limestone is characterized by its consistent grey color, density, and texture. It is typically free of visible cracks, fractures, or other structural weaknesses that could compromise its strength or durability.

In addition to these physical properties, these dimensional limestone outcroppings are sought after for their aesthetic appeal. The color and texture of the limestone can be used to create beautiful and distinctive architectural features and are often used in high-end construction projects where quality and aesthetics truly matter.

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Retaining Walls and Stepping Stones

Greystone's dimensional limestone is frequently used in retaining walls and stepping stone applications. This high-quality material is known for its durability, beauty, and versatility.

Quarried from specific geological formations (the Niagara Escarpment), material is selected for its uniform texture, color, and grain pattern, which makes it ideal for use in construction and landscaping projects.

When used in retaining walls, Greystone's dimensional limestone provides a strong, stable base that can withstand the weight of soil and other materials. It is also resistant to erosion and weathering, making it a great choice for outdoor applications and a popular choice among landscapers and homeowners.



High quality flagstone is a true marvel of nature that can add a stunning, natural touch to any landscape or building project. Its durability, thickness, and uniformity make it a reliable and sturdy material that can withstand harsh weather conditions and heavy foot traffic.


Greystone flagstone's beautiful colors and smooth textures allows for endless design possibilities, as each stone is unique in its own way. The clean-cut edges provide a sleek and professional appearance, making it a perfect choice for upscale projects.


Additionally, flagstone sourced from Greystone ensures consistency in color and texture, resulting in a stunning finished product that will last and elevate any outdoor space or construction project.

(call for availability)




For any inquiries, questions, please call:

(920) 858-5117 or fill out the following form

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Quarry Location

2574 Cloverleaf Road

Sturgeon Bay, Wisconsin


Tel: (920) 858-5117


To apply for a job with Greystone Mining LLC, please send a cover letter and resume to:

Get a quote: 920-858-5117

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