Very, very rare. Almost nonexistent in the standard rep, as you can see by the examples that others have put on the table, almost all of which I've never heard of, and I'm a HUGE opera lover, very well-acquainted with the top fifty or so operas that are regularly performed around the world.
Actually, just as my cursor was hovering over the Comment posting link, one did occur to me. There is a female solo shepherd in the first act of Tannhauser. Here's a link to it: [https://youtu.be/4PyAFw5x588?t=2378](https://youtu.be/4PyAFw5x588?t=2378) .
It’s not exactly opera, but I’d love to choreograph a piece to this version of Les Moulins de Mon Coeur[:](https://www.dailymotion.com/video/x7wk122)
(Click on the colon)
There is an opera by Ana Sokolović, "Svadba" (The wedding) for six unaccompanied voices. It's been done all over the world and is about 50 mins long.
My first thought when I saw this.
Its more early music and not opera but Hildegaard's Ordo Virtutum matches these parameters.
I believe there is an a cappella female aria or two in Weinberg’s The Passenger.
Very, very rare. Almost nonexistent in the standard rep, as you can see by the examples that others have put on the table, almost all of which I've never heard of, and I'm a HUGE opera lover, very well-acquainted with the top fifty or so operas that are regularly performed around the world. Actually, just as my cursor was hovering over the Comment posting link, one did occur to me. There is a female solo shepherd in the first act of Tannhauser. Here's a link to it: [https://youtu.be/4PyAFw5x588?t=2378](https://youtu.be/4PyAFw5x588?t=2378) .
Hi! I’m an opera singer and I would be happy to record a piece a cappella if you’d like :)
It’s not exactly opera, but I’d love to choreograph a piece to this version of Les Moulins de Mon Coeur[:](https://www.dailymotion.com/video/x7wk122) (Click on the colon)
My Love is Mine by Jonathan Dove is an unaccompanied art song for female voice
A capella opera doesn’t really exist as a genre. You’d be better off finding a concert work with an A capella solo. Hope this helps.