Pure silver is quite rare in nature. Silver is usually mixed in ores with other metals, typically found in large zinc mining operations. Gold, on the other hand, is often seen in its pure form in nuggets of varying sizes; this is rarely the case with silver. For this reason (and many others), silver is often considered to be rarer and more precious than gold.
In recent years, the demand for silver has increased since it is easily traded (via liquid) and has a low buy and sell price spread. Physical silver has more appeal for barter and trading purposes due to its small divisibility (in smaller purchases) while gold serves a store of value for more significant amounts of wealth. This is just one of the reasons governments have historically confiscated and hoarded gold. Silver, on the other hand, has never been seized by governments, giving it tremendous appeal to many Americans who want to hedge their portfolio.
The Reagan Gold Group is a privately-held company based in Los Angeles that supports clients interested in diversifying their portfolio by acquiring physical gold and silver coins, or by adding physical gold and silver to an existing IRA account.