Butterfly ring by Saburo Kase

Diagrams in A Arte dos Mestres de Origami by Mari Kanegae
Diagrams in BOS Convention 1984 Spring
Diagrams in BOS Magazine 110
Diagrams in BOS Magazine 250
Diagrams in NOA Kessakusen 3
Diagrams in NOA Magazine 177
Diagrams in NOA Magazine 274
Diagrams in Origami - A Complete Step-by-Step Guide by Paul Jackson
Diagrams in ORU Magazine 3
Diagrams in The Complete Origami Course by Paul Jackson
Diagrams in The Origami Collection 10

Money diamond ring by Cindy Ng

Diagrams in Travel Origami by Cindy Ng
Folded from a hell bank note

Punk rocker ring by Cindy Ng

Diagrams in Travel Origami by Cindy Ng
Folded from a hell bank note