Granite is generally a durable natural stone that is suitable for exterior applications, including in cold climates. However, it is always recommended to check the specific properties and characteristics of the Kometa Black Granite from Ukraine, as different types of granite may vary in terms of their suitability for certain conditions. It is advisable to consult with local experts or professionals in the field, such as architects, contractors, or stone suppliers, who can provide accurate information based on the specific climate and conditions of your area. They can assess whether the Kometa Black Granite is suitable for exterior use in cold climates, considering factors such as its composition, density, and resistance to freeze-thaw cycles. By consulting with experts, you can ensure that you choose the most appropriate natural stone for your exterior applications.