Depending on the size, Heraeus silver bars are minted or cast. The purity is always 999.9. Minted silver bars are available in two sizes: 1 oz and 100 g. They come in the blister packaging. Serial numbers are stamped on cast bars from 1 kg upwards. Certificates are not provided for either minted or cast silver bars (250 g, 500 g, 1 kg, 5 kg, 15 kg).