Trio of tiny antique brooches, two signed

These three early 20th century gold filled or plated brooches are all in very good condition. The sorority piece actually consists of two pins, connected by a 1-1/2 inch chain: the Beta Sigma Phi emblem with seed pearls and enamel (just over 1/2 inch across) and the goldtone torch (about 5/8 inch long). The back of the emblem piece is marked Balfour. Balfour & Co. have been creating class, fraternity, sorority and other academic commemorative items since 1913. The starburst or snowflake features blue and white rhinestones and measures about 7/8 inch in diameter It is unmarked. The one-inch bar brooch is marked FP in a diamond, the mark for the early 20th C. jewelers Fritz & Pruefer. It is also marked "Pat Apr. 19 10" (the 10 is hard to see in the photo), which means a patent was approved in 1910 (Apr. might mean either Approved or April).