1, there are many kinds of crystals, and the specific prices are different. Some are calculated in grams. For example, the price of tourmaline is relatively expensive, ranging from twenty or thirty yuan to several hundred yuan; Some do not press the gram, but calculate the price according to the finished product. For example, agate is a kind of crystal, and the price is much lower. Generally, a string of agate bracelets has a minimum of several yuan and a maximum of several thousand yuan. Of course, this is not absolute, but also depends on the comprehensive theory of color. I don't know what you want to ask, jewelry or ornaments, or crystal rough stone.

2. Jadeite is divided into two categories: Jadeite, which is what we usually call jadeite. Jade is made of glass, and the original stone is mined and processed into ornaments or handicrafts. Generally, it is priced by piece, not by gram. For example, there are ten to hundreds of thousands or even millions of jade bracelets (as are jade pendants), and the original jade stone is generally sold by kilogram, depending on the color, commonly known as. The second category is nephrite. Hetian jade, Xiuyu jade, lantian jade and Nanyang dushan jade all belong to nephrite. Among nephrite, Hetian jade is the top grade, and the price is relatively high. The best of Hetian jade is suet jade, some are calculated by grams, and some are calculated by finished products. Sheep fat jade pendants are generally at least several hundred yuan, and the highest is several hundred million yuan.

3. Platinum is not priced by grams, but by finished products, including 24K, 18K, 14K, etc., and the prices are lower in turn.

The price of gold fluctuates every day. At present, the price of gold shops is around 99.99% in 240 yuan/gram and 99% in gold. I don't know the price of 18K gold and 14K gold. You can ask at the local gold shop.

The price of silver is about 5 yuan per gram.

I don't know the price of copper. You can ask the garbage collector.

5. Diamonds are priced in carats, depending on the specific situation.

Finally, I suggest you be clear when you ask questions in the future. I don't know what you want to know. I hope I can help you. Hehe, and remember to reward points next time. Don't be too stingy.