A wonderful vintage Designer Signed Blue Aurora Borealis Brooch. This pretty piece is signed Keyes ( Keyes = A Canadian Co. Whom produced jewelry C. 1962 - 1990's . Many pieces were very similar in quality and design as The Sherman Jewelry Company in Canada. This beauty is approx. 2" across. Prong set and rhodium plate. The clasp is secure and a locking roll over C style. This brooch is dimensional .