* Hardness: 3 - 4 on the Mohs Hardness Scale (can be scratched by a copper coin)

* Luster: Dull to slightly pearly or earthy

* Streak Color: White, although it can vary depending on the impurities present.

Important Note: Limestone is a sedimentary rock composed primarily of calcium carbonate (CaCO3). Its properties can vary slightly depending on its composition, impurities, and how it was formed.