This is unique stone that comes in various shapes, sizes, and features. The stones are primarily charcoal colored with common characteristics that include some white marbling, grooves, and jagged edges. It often used in Iwagumi rock layouts but is versatile and can create a range of looks depending on use. Please note, not all stone pieces have white marbling. Some are a solid black. Please include in the notes if you are looking for a specific coloring.
One well-placed massive rock can make your aquascape really shine.