Mustard SeedSolid silver . 925 is used to make the pen clip and accent rings of the Mustard Seed pen. This pen is a one of a kind, completely hand turned and polished to an ultra fine finish to show the amazing lustre achievable with this adorable material, all done by myself in my small home workshop. No pen kit used. The level of craftmanship, time involved and quality is reflected in the price. Fitted with polished steel iridium tip Bock nib medium size 6.