Blue Calcite is a carbonate mineral found abundantly in Mexico. Some deep blue coloured Calcite has also been found in South Africa.
Calcite, in general, is said to be a powerful energy cleanser and amplifier. It is believed it is an active crystal that speeds up growth and development, as well as spiritual development. It is said to encourage emotional intelligence, combat laziness, encourage turning ideas into action, calm one's mind and disperse emotional stress, bringing serenity.
Blue Calcite, in particular, is said to gently recuperate and relax, lower blood pressure, dissolve pain on all levels, lift anxiety, soothe nerves, aid clear communication, especially where there are differences of opinion. It is also believed that blue Calcite can absorb, filter and return a more beneficial energy to it's sender.