In her book 'Classic Plastics. From Bakelite to High Tech' (1984) by Sylvia Katz, she lists 111 Trade names for Phenol Formaldehyde which include cast phenolic and laminates.

Another one I know was used for jewellery was Marblette (Marblette Corporation USA)

The companies are also listed, and are mostly in the USA and UK, but also include Hungary, Czechoslovakia, Germany, France, Italy and Poland.

Carole