The official crown utilized by the Alderaanian monarch was known as the crown of Alderaan. Typically housed within a museum, it would sometimes be showcased within the royal palace's throne room for significant events, such as the heir's Day of Demand.
During 27 BBY, Queen Breha Organa of Alderaan welcomed Senator Padmé Amidala and her retinue in the palace throne room; for the occasion, the crown was incorporated into the braid styled atop her head.
For Princess Leia's Day of Demand in 3 BBY, the crown was returned from the museum to the palace throne room. It was displayed atop a marble pillar, lit by a dedicated candledroid.