As per Crystals and Jewelry, red calcite is known for safeguarding boundaries, including physical, emotional and energetic boundaries. It's a stone that is known for being grounding and offering protection. It may also help to alleviate feelings of confusion and restlessness.
This semi-precious stone can also help to prevent you from overextending yourself and over using your energy. It can also act as a cleanser of different energy types, such as negative energy. Red calcite can be used to help open and activate the base chakra, which can be used to boost energy and offer vitality. It can also help to provide sensual stimulation and a greater level of appreciation for your physical experiences and feelings. If you are feeling a lack of motivation, red calcite can be used to help restore motivation and speed up the progress and development that you achieve.
This crystal can also be used to absorb any unwanted energies, returning them to where they initially came from.