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Gold has been used as a means of exchange for thousands of years. The ancients were captivated by its color, entire civilizations have used it at the basis for their currencies, and even today it is seen as an ideal asset whenever world events cause a "flight to safety." In more recent times, many investors have taken the benefits of owning gold a step further, by buying gold mining stocks. By investing in a gold mining stock, investors not only own gold indirectly, but also a stake in a possibly a value-creating enterprise as well. Which leads us to an important question: which is the best gold stock to own?

Well, for investors looking to get in on the precious metals game, there are plenty of gold mining stocks to pick from:

Company  Symbol Current Yield Mining Locations
Agnico-Eagle Mines Ltd.  NYSE: AEM 0.79%  North America, Europe
AngloGold Ashanti Limited  NYSE: AU N/A  Africa
Barrick Gold Corp.  NYSE: ABX 0.46% Americas, Africa, and Australia
Eldorado Gold Corporation  NYSE: EGO N/A  Europe, Asia, S. America
Franco-Nevada Corp.  NYSE: FNV 1.27%  N. America, Africa, Australia
Goldcorp Inc.   NYSE: GG 0.52%  Canada and Latin America
Kinross Gold Corp.  NYSE: KGC N/A  N. America, Russia, W. Africa, S. America
Newmont Mining Corp.  NYSE: NEM 0.26%  Americas, Asia, and Africa
Royal Gold, Inc.  NYSE: RGLD 1.25%  Global (Streaming)
Silver Wheaton  NYSE: SLW 0.78%  Global (Streaming)
ASA Gold and Precious Metals Ltd.  NYSE: ASA 0.29%  N/A
Yamana Gold Inc.  NYSE: AUY 0.48% Americas

The end products for these companies is, obviously, the same. So, when choosing which is the best gold stock to own, investors need to focus on each miner's unique business model and financial strength. Here are the three best gold stocks for investors to consider.

A gold stock without any gold mines

Royal Gold (RGLD 1.96%)-The first pick on our list, Royal Gold, has a non-traditional business model. Instead of actually owning and operating gold mines, Royal Gold acts as a financier for mining projects in exchange for royalties and/or metal streams on the production of the properties in question. Royal Gold's specialty is in financing development stage mines but, thanks to its past successes, also owns interests in currently producing operations. 

As of late last year, the company owned streaming interests (essentially the right to buy gold and silver ore at below market rates from a mining company in exchange for an upfront fee) on five producing properties and two development stage mines. Additionally, it owns royalty interests on 34 producing properties, 22 development stage properties, and 135 exploration stage properties. This broad array of interests should keep the cash flow coming for decades into the future. Royal also has a pristine balance sheet, with over $3 billion in assets supporting just $780 million in liabilities as of its latest earnings release. 

All in all, and especially after mixing in a 1.25% dividend yield, Royal Gold offers investors a great way to get in on the gold stock game without the associated risks of actually managing often dangerous mining operations. 

An old fashioned gold miner

Goldcorp (GG) not only produces gold, but also silver and other base metals as well. Through its ownership of both owned and joint-venture mining properties throughout Canada and Latin America, it boasts proved/probable reserves of 40.7 million oz. of gold, 704.6 million oz. of silver, as well as smaller quantities of numerous other minerals. 

Recently, unique circumstances (including focusing on planned lower-grade zones at most of its mines and accident at its Merlin mine located in Guatemala) led to a 15% drop in quarterly production Q2 2015. That being said, recently announced cost saving initiatives which should lead to $250 million in annual savings by FY 2018, as well as a likely ramping up of production in the quarters ahead, will likely make recent difficulties just a memory. 

Goldcorp has also proven itself to be an innovator in the gold mining industry. It continues to make major investments in automating as much of its operations as it can, thus saving on labor costs. It is also beginning to see the benefits of upgrading its fleet of mining trucks. 

All in all, Goldcorp is a cost-conscious, diversified, gold miner with a healthy balance sheet which exhibits a debt/assets ratio of just 39.5%. In the gold stock game, this is about as good as it gets. 

Keeping it simple

OK, so we might be cheating with this last pick. But hear us out. All gold mining stocks, no matter how well run, are inevitably going to be correlated to each. This is because their fortunes depend, in large part, on one thing: the price of gold. Given this simple fact, why not save the headache and simply buy shares in the SPDR Gold Trust (GLD 0.53%)

GLD offers the average investor all the benefits of owning physical gold, minus minimal expenses (estimated to be 0.40% of assets per annum), without the hassles of hiding gold bricks under your mattress. The SPDR Gold Trust also allows investors the chance to take part in an increase in the price of gold, without the inherent risks of buying shares in actual gold miners. Managements of individual companies may screw up and fail to find deposits of gold with shareholder capital, but that's not something an investor in GLD need worry about. 

If you're looking to allocate a portion of your portfolio to gold stocks as a way to diversify and possibly take part in further increases in the price of gold, SPDR Gold Trust is a great way to do it hassle free.