I believe this to be an early (1890) Loetz Marmorieties glass or Carneol glass inkwell. As I understand it, Loetz made very few inkwells and when they did it was a showpiece, which I believe this is. I own 40-50 large bohemian art glass inkwells (I'll post some of them in the future), most of which were attributed to Loetz but are actually Kralik or Stolzle or PK - if anyone knows for sure, please let me know. This is their attempt to make glass look like marble. This big boy is 7-1/4" widest base diameter, 6" tall to top of finial and the glass is 4" in diameter. I believe the liner is original.