The most modern and expensive method is the x-ray fluorescence testing where the gold x-ray dispersion analysis technique is applied. This does a detailed analysis and a full report containing the percentage of gold or any other alloy components like zinc or copper is obtained.
Many online buy and sell gold services offer to match prices so you can get the best price for your jewelry. Before you decide to sell gold online, you need to ensure that the buyer has good reputation and has a good gold buy sell policy and system in place. You need to ensure that you get a receipt immediately after the buyer receives your gold. Besides, it is also important to ensure that the buyer is known for making prompt assessment of your gold and makes prompt payments. Many buyers provide insurance so that you are covered in case the gold is lost in transit. www.a1mint.com/shop/