This is a great slice of Caribbean Calcite, polished to make it smooth.
It is a mix of Blue Calcite and Brown and White Aragonite and despite its name, it was discovered in Pakistan in 2015.
This slice has been polished on both sides to make it smooth to the touch. However, Caribbean Calcite is a stone which generally has a highly uneven surface with many pits, crevices and caves present. Sometimes there are even further crystallisations within these crevices and caves !
So although we say smooth .....
Overall, you would say it is blue in colour. However, the blue is sometimes a bright blue and sometimes it is more of a greenish blue. The brown is sometimes a dark brown but more often is a light tan in colour.
It is a great problem solving crystal, helping us to see our problems, what caused them and how to solve them. It is also an excellent communication stone, extremely useful to work with when other people just can't, or won't, see your point of view.