Calcite is a powerful energy cleanser amplifier. The energy of Calcite purifies and cleans out negative energy from pretty much anywhere, a room, body, furniture, etc.
It is said to be effective at clearing out old energy patterns and increasing personal motivation and drive. It is also known as a mind stone as it heightens mental discernment and analysis, increases memory and the ability to learn quickly and efficiently, great to have on your desk during revision/tests, etc. Calcite is by far the best stone for anyone studying.
Calcite is also good during times of disagreements as it can show you a new way to look at a situation, easing you away from outdated thought patterns making space for new inspiration and ideas.