Working member:
A company, factory or institution that manufactures stone, marble, granite and/or tile
Must have been established for at least one year
Must have capital of at least JD 30,000
Must have at least 10 employees registered in social security

Participating member:
A company, factory or institution that either works in manufacturing stone, marble, granite and tile or works in industries and services supporting this sector.
Members meeting the requirements for working members can elect to be participating members

Honorary member:
Institutes or individuals from inside or outside the sector, appointed by Jostone's board of directors