I dont have up-to-date information on the exact pricing of specific stones, but generally, the rarity, quality, and demand for a stone determine its cost. The Senones Trachyte, also known as the Senones Basalt, is a volcanic rock commonly found in France and Italy. The prices may vary depending on factors such as location, quarry, and market demand, but it is generally considered an affordable building material. It is often used for paving, cladding, and landscaping applications due to its durability and natural beauty.