Article in English: Knowing how much your gold is worth is great information to have as you begin the process of selling it. There is an exact formula for calculating the per-gram value of your scrap gold, and the only variable factor in the equation is the current market price of gold. You can find the current price by searching the Internet or looking it up in your local newspaper. Gold is valued per troy ounce, with a troy ounce equaling 31.1 grams. The price of gold fluctuates hourly according to supply and demand, so the price may be very different in the afternoon from the price you saw in the morning. It is best to use the Internet for updates, which you can even do while standing at the gold buyer's counter by using your cell phone's Internet access capabilities. For example, if today's price per ounce is USD$1,600, then today's price per gram is USD$51.45 (USD$1,600/31.1). by the fineness of the gold. For each group of gold, divide the karat by 24, then multiply that number by today's gold price per gram. For example, if you have 10K gold and the current price of gold is USD$1,600 per ounce or USD$51.45 per gram ($1,600/31.1), then the price of your scrap gold is USD$51.45 x .4167 = USD$21.44 per gram. Use the following conversions to value your gold.  10k = 10/24 = .4167 14k = 14/24 = .5833 18k = 18/24 = .750 22k = 22/24 = .9167 The gold still has to go through an assay process to determine the true percentage of gold. For example, 14kt gold assayed is .575%. When you melt gold you will lose weight due to alloys used in the making process. Assaying is a process wherein a sample of the gold is taken from the whole to be processed and assessed for purity. The sample is melted, separated, and weighed to reach a conclusion about its purity. If you have 10 grams of 10K gold and you calculated the price at USD$21.44 per gram, then your scrap gold is worth 10 x USD$21.44 = USD$214.40. Some examples:  If you have 5 grams of 14K scrap and gold is USD$1,600.00 today, then USD$1,600 divided by 31.1 would equal USD$51.45. That...

Summary in Vietnamese:
Xác định giá trị hiện tại của vàng. Chia giá vàng hôm nay theo đồng/ounce cho 31,1 để có giá vàng hôm nay theo gam. Nhân cho chất lượng của vàng. Thực hiện quá trình phân tích để đảm bảo giá trị của vàng. Nhân giá vàng theo gam cho trọng lượng theo gam.