👉 Gurneyite is a mineral that occurs in the rocks and minerals of the United States. It is composed primarily of calcium carbonate, but it can also contain other materials such as iron oxide or silica. Gurneyite has a grayish-white to brownish-gray color with an irregular texture, and it is found in various geological formations, including sandstone, limestone, and marble. Gurneyite was named after the town of Gurneyville in New Hampshire, where it was
