An 87+g sample of α-Tin allotrope also known as grey Tin or Tin pest. This is stabilized with 0.5% Ge so the purity is 99.95%. Regular β-Tin will undergo a slow transformation below 13.2° C to form the α-Tin allotrope offered here. The sample is sealed in a quartz dome under Argon to permanently preserve the shiny surface. This is a truly unique and one of a kind piece! Pictures just don't do it justice.