Curious about Oolong Tea and Assam Black Tea facts. Here, get to know interesting Oolong Tea and Assam Black Tea facts. Also, get to know about Oolong Tea and Assam Black Tea brands, where they are originated, their popularity and many more. Oolong Tea and Assam Black Tea brands listed below will indicate how popular they are around the globe. Also some Oolong Tea and Assam Black Tea facts are mentioned below, which would be quite interesting to know.