Emeraude is a late french prog band that in 1981 enregistered their first album "Geoffroy" in tiny quantities as a private pressing.
Acording to Asbjønrsen, their music "was conceptual, progressive folk-rock with barique touches and lots of spoken English lyrics, centered around two long tracks: "Viking" (12:00) and "Geoffroy" (16:28)". Some Parts have acoustic guitar and piano only, others have the full electric treatment with melodic guitar, piano, bass and drums".
Their sound could be described as a nostalgic mix between Pentacle and Cressida. I think that fans of neoprog (i honestly hate it) could find themselves pleased with their melodic sounds, while certainly fans of prog would find in that album a very classic melodic prog sound.
At last you will notice that for be a private pressing, the sound quality its quite good.
Links in comments
Emeraude-"boule de plume"