Cecilia Sanctus Rosin
Initially introduced as "Andrea Sanctus" to celebrate Cremona in America's 10th Anniversary in 2018, this unique cake contains 2 rosin formulas with different properties. The outer ring formula gives a silky smooth bowing experience with a focused sound, while the center formula kicks in when the player demands more power and gutsiness from their instrument; available in 3 formulas: Violin, Viola & Cello; one size only.
I have been playing violin, cello and viola for a very long time, starting with violin in 1938. I have bought and still have dozens and dozens of different rosin brands and grades. I certainly have more than my luthier's store! I doubt you could name a rosin I don't have.
Without a doubt this Andrea Sanctus viola rosin is the best I have ever used for playing viola - and it is also wonderful for my violin bows. It not only provides for a powerful tone but also grips and releases well for off string strokes and for gently tapered playing. It also seems to last through a full rehearsal session without degrading. And it inspired me to purchase the cello grade as well - which seems to be equally fine.