How exactly do I use these shungite stones to prepare my water? — Shungite Stone for Water Purification, Fraction 10–20 mm

Using the 5–20 mm stones is straightforward. First, you must prepare them by thoroughly rinsing under cold running water until the water runs clear. This removes any fine mineral dust from packaging. Place the rinsed stones in your container—a glass jug, pitcher, or carafe is ideal—and then fill it with tap water. The specific ratio of water to stone weight isn't defined, but a common practice is to use the entire 500 g bag for 2 to 5 liters of water. The stones work through physical contact, so leave the water to stand at room temperature for a period, typically 6 to 12 hours or overnight. After this contact time, you can pour the water for use, leaving the stones at the bottom. They are meant to be used as a traditional, low-tech preparation method, not as a flavoring additive. Remember to rinse the stones occasionally and let them dry between uses to maintain their condition. If your water source is of uncertain microbiological quality, shungite alone is not a sufficient purification method.