Andrea had a name change and it is now “Cecilia” – same formula.
https://cremonainamerica.com/

Each block of Andrea Cello Rosin is made by hand in the USA from a select blend of the highest quality ingredients by professional New York violinist Peter Bang. You may remember that ANDREA rosin was made by Andrea Bang several years ago under the name Tartini (not to be confused with New Tartini which is a different product).

Bought and used by professional cellists, this rosin is worth every penny for the sound that it draws from your instrument. Many professional musicians won’t use any other rosin, and if you try it you’ll understand why. Just 3 – 4 swipes of your bow over the rosin is enough due to it’s powerful formulation, meaning it’s economical too.