The current price of gold changes every few seconds due to several different factors such as current events, changes in currency values, and speculation within markets. JMBullion.com provides charts that show the price fluctuations by second according to the Gold Spot Price.
JMBullion.com defines the Spot Price of gold as representing "the price at which the commodity may be exchanged and delivered upon now." The value of gold is also determined by the gold content and its collectibility. This means that the current rate of gold advertised is not completely accurate for all forms of gold purities.
To find an estimate for the cost of gold, visit GoldCalc.com, and plug in the weight and gold purity in order to determine the estimated price. A gram scale is necessary for accurate results, as well as a gold testing kit, which will help determine the purity of the gold by exposing the metals to different acid-based chemicals. Find both of these items at an affordable price through Amazon.com, which delivers a variety of options. Keep in mind that the more inexpensive a product is, the more likely it will not be as reliable as a good-quality product with a higher price range.