Pectolite is a rare mineral composed of hydrated sodium calcium silicate. It is known for its beautiful bluish-green color and is often used in jewelry making. However, there are several synonyms for the mineral, including acmite, apophyllite, astrophyllite, and basalt. These synonyms are often used interchangeably, though they all have slightly different chemical compositions and properties. Acmite, for example, is a dark-colored mineral that is often found in igneous rocks, while apophyllite is a colorless or white mineral that is commonly found in volcanic rocks. Regardless of their differences, all of these minerals have their own unique properties that make them valuable in a wide range of applications.