Most purple sea glass starts out clear, and the manganese in the glass turns purple over the course of decades with exposure to sunlight (to UV rays, specifically.) Sea glass is all about chemistry and patience!
The star of this piece, though, is the tiny, headless china doll. She’s a type of doll popular in the late 19th century known as a Frozen Charlotte: the name comes from a ballad about a young girl named Charlotte who refused to wear a cloak over her party dress and consequently froze to death. Cheery little ditty!
This image is also available through Anthropologie: www.anthropologie.com