1 Apply Aloe vera gel or juice: Aloe vera gel or juice helps get rid of acne scars and makes your facial skin healthier. 2  There are many brands of aloe vera gel or juice available on the market today.
Jupiterimages/Photos.com/Getty Images. Limestones are a class of sedimentary rocks composed of the same mineral, calcite, which is made from calcium carbonate, or CaCO3. Despite this similarity in composition, however, not all limestone rocks are the same. Chalk is actually a special form of limestone that exhibits some differences from other rocks in the same class.
  chalk is made from substances in the earth, (which i don't know the name of) and it is a weak rock that we always see in class,(depends if your teacher is a smartboard â¦ or Geniusboard user or uses marker). Chalk is used for writing, lawn tennis, gymnastics, and toothpaste. 4 people found this useful. Answered.