A 5g sample of Titanium metal in the form of small anodized pellets.  These are extremely high purity, 99.995%.  If you prefer a more colorful sample of this grey metal, these colorful anodized pellets are the perfect choice.  The colors are not produced from paint or dye but instead by the process of anodizing.  This process creates an oxide layer on the surface which absorbs, refracts and reflects certain wavelengths of light producing the observed colors.  The color depends on the thickness of the oxide layer.