In principle, Parry oriented column crystals may also produce the arc, although this is rare.
Joan of Arc | Arc de Triomphe | Hubert Parry | L'Arc-en-Ciel | ARC | The Passion of Joan of Arc | story arc | Thomas Gambier Parry | Prix de l'Arc de Triomphe | Fort Jeanne d'Arc | Joan of Arc (1948 film) | Arc of Infinity | Arc lamp | Arc Angels | Sir Love Jones-Parry, 1st Baronet | Royal Saltworks at Arc-et-Senans | Rick Parry | Minute of arc | Milman Parry | Michael Gambier-Parry | Jeanne d'Arc | James Parry | EID Parry | arc lamp | ARC International | Union Sportive Jeanne d'Arc Carquefou | Parry Sound, Ontario | Parry Sound | Parry | minute of arc |