The following information is extracted from The Book of Stones and other sources:
Larimar is a form of blue pectolite, a sodium calcium silicate mineral with a hardness of 4.5 to 5. It occurs as aggregates of needle-like crystals, grown together in a solid mass, characterized by dramatic patterns of blue, blue-green and white. It forms in cavities within basaltic lava and is found only on the island of Hispaniola in the Dominican Republic. Because the area in which it can be found is tiny and the material is in short supply, the stones are priced accordingly.
Larimar is said to enhance communication and feminine power and soothe the emotional body. Naisha Ahsian, in The Book of Stones, calls larimar one of the cardinal water element stones..
Below are a few of the Larimar stones I have wrapped.