We've been on the hunt recently for some pure Yixing clays similar to those used in antique pots. This is a batch of a type of Lao Tuanni clay we found recently called MeihuaNi (Cherry Blossom Clay), due to its speckled appearance. It's a very nice clay and develops a lovely deep colour and shine when high fired. It's fully handmade and has a single hole filter inside. Attached is EDXRF test report showing no additives.