Mid Century Modernist Signed Rutile Quartz Brooch Silver

This is a fantastic brooch, it is artist signed but I don’t know who the designer is? The piece has a very mid century feel and it is expertly designed and executed. There are basically no “bad designers” who used Rutile quartz it was a favorite of Torun, Jensen and a lot of high end Scandinavian artists. The only other marks are 925 and C6. Measures 2.5 inches by 1 ⅜ inches and weighs 24.2 grams. Very good condition.