There are many websites or shops out there, but I only know one website, Ebay.
Only a 5-string or 6-string cello will have a low F string. Regular 4-string cellos are tuned C-G-D-A (low to high, in fifths). A 6 string cello adds a low F, and a high E. A 5-string cello adds EITHER a low F OR a high E.
One could find cello string at many musical stores or even online on ebay, amazon, and craigslist. Be careful when buying cello strings because the cello uses different strings. It would be a shame to buy the string that was not needed.
a violin, viola and a cello or two violins and a cello
A string
1st violin 2nd violin Viola Cello
The cello is one of the 4 members of the string orchestra family. If you are talking about the full string family, it is viola, cello, bass, violin, piano, and guitar.
ViolinViolaCelloBassHarp
Cello. All the way.
1st violin 2nd violin Viola Cello
A viola has an A string, D string, G string, and C string. It's one octave above the cello.. It is also tuned 1/5 below the violin.
Two violins, a viola and a cello is the standard.
Typically a string quartet is two violins, one viola, one cello.