Silver is a soft, lustrous, and ductile metal, with high thermal and electrical conductivity. It is a noble metal and a group 11 element, like gold. It also forms alloys with gold and other metals.
Copper is a reddish-orange, malleable, and ductile metal, with high thermal and electrical conductivity. It is a transition metal and a group 11 element, like gold. It also forms alloys with gold and other metals, such as brass and bronze.
Platinum is a silvery-white, dense, and ductile metal, with high resistance to corrosion and oxidation. It is a noble metal and a group 10 element, adjacent to gold in the periodic table. It also forms alloys with gold and other metals, such as white gold and platinum group metals.
Palladium is a silvery-white, soft, and ductile metal, with high catalytic activity and electrical conductivity. It is a noble metal and a group 10 element, adjacent to gold in the periodic table. It also forms alloys with gold and other metals, such as white gold and palladium group metals.
Iridium is a silvery-white, hard, and brittle metal, with high density and resistance to corrosion and oxidation. It is a noble metal and a group 9 element, next to gold in the periodic table. It also forms alloys with gold and other metals, such as white gold and iridium group metals.