Pyragryrite
Pyrargyrite, sometimes known as ruby silver, is a mineral compound of silver, sulfur and antimony. Pyrargyrite is a deep red or red-grey color. Like other silver ores, it exists primarily in moderate or low temperature hydrothermal vents, where water escapes from the Earth's center. It was first classified in 1831 in Mexico.
Chlorargyrite
Chlorargyrite is silver combined with chlorine. It was first classified in 1875 in the New South Wales area of Australia. Chlorargyrite can be a purple-gray color, green or white. It may also be transparent. Chlorargyrite is sometimes known colloquially as "horn silver."
Acanthite
Acanthite is the stable form of silver sulfide, or silver bonded with sulfur. Acanthite is a silver-gray mineral found most often around cool hydrothermal vents. Miners often find acanthite alongside a large variety of other minerals, including quartz, calcite and native silver.
Electrum
Silver alloys readily with gold in nature, forming a material known as electrum. People have used electrum throughout history as a source of both gold and silver as well as a source of jewelry and coinage in its own right. It is a pale yellow or yellow-white color, and miners commonly find it in both gold and silver mines.