Osmanthus is a plant primarily native to Eastern Asia, although a few species do also grow in the southernmost regions of North America. It produces a small, white flower and is related to the olive tree; in some places it is also called Sweet Olive, or Fragrant Tea Olive. It smells so divine! It's a little herbal, herbaceous without being overly woodsy, and lightly floral.
The base of this soap has a creamy, custard color to it; but some fragrances - especially those containing vanilla - can cause the soap to darken to a tan or even a dark brown. I try to wait until this begins to happen to photograph my soap so that you are aware of what you are getting; however, it does get darker over time so your soap may be darker than photographed.
A great gift for that yarn lover in your life, if you don't know what kind of yarn to give them (although here's a hint: yarn lovers just flat out love yarn - all yarn!). Many knitters and crocheters keep these bars in their project bags so that their yarn smells extraordinary.