Summer Glau wore Tresor Mosaico 18K yellow gold rose quartz dangle earrings to the 2012 Dizzy Feet Foundation Celebration of Dance Gala at the Dorothy Chandler Pavilion on July 28, 2012 in Los Angeles, California.
Trésor’s Mosaico Collection Earrings feature a gorgeous conglomerate of Natural Multicolor Sapphires that form a beautiful oval-shaped mosaic. Set in 18K Yellow Gold.
The expensive earrings Summer Glau wore at the celebration of Dance gala were probably lend by Tresor, as it's often the case when designers are looking to advertise their brand.
Tresor has a record of doing this with celebrities looking for glamourous pieces of jewelery.