A 10g sample of rare earth Lanthanum metal under oil in a screw top vial. Purity is 99.5%. Size, shape and number of pieces will vary but you'll receive a total of 10g. This will come vacuumed sealed with a coating of oil to prevent oxidation of this air reactive rare earth metal. Please check my Bonanza store for more element samples. I have almost every collectible element available. Thanks for looking.