* Calcite: This is a very common mineral found in many different environments. It is often used in construction and as a source of lime.
* Gypsum: This is another common mineral that is used in drywall and plaster. It is also used to make fertilizer.
* Halite (Rock Salt): This is a mineral that is easily identified by its salty taste. It is used in food, as a de-icer, and in many industrial processes.
* Talc: This is the softest mineral on the Mohs hardness scale, with a hardness of 1. However, some varieties of talc can have a hardness of 2.5-3. It is used in cosmetics, paint, and other products.
To help narrow down the possibilities, you might need to consider other properties of the mineral, such as its color, luster, cleavage, and streak.
