Opal functions as a material hub, with recorded child paths including Pink Opal. Across the hub, catalogue forms include carvings, tumbled stones, chips, and rings. The hierarchy keeps broader family browsing separate from the more specific material collections beneath it.
Choose a recorded child material path first, then compare its forms against carvings, tumbled stones, chips, and rings. Product-type labels such as Tumbled Stone, Crystal Carving, and Crystal Jewelry add another catalogue distinction without changing the family relationship.