Living in a glacial dump of metamorphic rocks and boulders is a bane for both the builder and farmer. If your are a farmer, every spring, frost pushes to the surface an never ending crop of rocks. Building in such an environment requires heavy equipment to not only excavate a basement, but also to remove uncovered boulders. Using boulders in landscaping can be a challenge also, but not so much, if you have neighbors who are willing to use their logging truck with a loader to pick up and move boulders.
Boulders were strategically placed to form a protective barrier around our well casing, and to provide a natural screen between the propane tank and our house. Cleaning the boulders with a high powered spray, enhanced the unique colors and features of each rock. The exposed features quickly faded as the water evaporated. To recreate the wet look, I applied one coat of concrete sealer. A single application was just enough to enhance the color and flaws, but not so much as to give the boulders an unnatural high gloss finish.