The price of gold is calculated by weight, and there are several weighing methods in the precious metals and gems market. The most commonly used system is the troy system, and one troy ounce is about 31.10g; An ounce is about 28.35 grams.
This price is the dollar price per ounce of gold. The rise in the price of gold will affect the currency prices of some countries. There are many factors that affect the price of gold, such as: international politics, economic exchange market, interest rates and monetary policies of major European and American countries, the increase or decrease of gold reserves of central banks, the increase or decrease of gold mining costs, the increase or decrease of jewelry gold, etc.
Extended data:
In fact, 100% pure gold does not exist. The first reason lies in refining technology, and the second reason is that gold ornaments with connection points must use solder in the process of gold ornaments or gold bars processing.
In the process of processing gold ornaments, the solder used is composed of specific alloy materials, mainly gold, with a small amount of silver, copper or tin.
According to experts, solders are divided into three types: high welding, medium welding and low welding, with gold contents of 940‰, 920‰ and 840‰ respectively. Pure gold and thousands of gold jewelry generally use solder with gold content exceeding 90% to ensure the gold purity of jewelry. The proportion of solder is about 0.2%. In other K-gold ornaments, the content of solder is slightly higher, but it will not exceed 8%.
Baidu encyclopedia-gold price