Some of the analysts are actually saying now there is more gold than silver in usable, above ground form.
Estimates for gold are usually in the 7-10 billion ounce range. Silver estimates are coming in at 5-6 billion ounces.
I'm comfortable with the mathematics provided by this article, which relates that "Clearly, silver is not more rare than gold, but a 1 to 5.78 rarity ratio is indicative of the incredible leverage to be found in all silver related investments...".
I do believe that silver is a good deal more common than gold; it's just an atomically more-common Element in the makeup of the Earth's crust!
But it's not vastly more common. Even if there is only 6 times as much as silver above ground as there is gold (or a little less than that, even), if both return to usage as Monetary or quasi-monetary metals within the next decade (as I think not only possible, but perhaps likely), then it's easy to imagine silver returning to its ancient, historical Valuation Ratio of about 1/16 of gold's price; and possibly even move closer to its actual scarcity ratio, perhaps 1/10th of gold's price.
But a return to those levels, from silver's current price of only 1/66th the price of gold, would imply gains in silver valuations 4 to 6 times greater than concurrent gains in gold valuations. Silver also has more utility value as small-denomination coinage for the purchase of food and other essentials in an inflationary depression or similar national crisis. I trade both but I like silver a little better.