Rock containing metal is known as ore - iron ore, copper ore, and so on. As to being worth extracting, depends on the richness of the metal deposits.
Ores
The rocks have a high enough metal content to make them economically viable for extraction. The metal can be extracted and used for various industrial purposes. Extracting the metal from the rocks would be profitable.
This is not even close to enough information. If you want to know how much a bracelet is worth, take it to a jeweller and have it appraised.
Mineral,is a naturally occurring material in which metal or its compounds occur.An ore is that mineral in which metal is present in large quantity and from which the metal can be extracted in pure and high quality,economically.
Yes. it's done all the time both in laboratories and in factories. The procedure is pretty simple: start with any starch (if you're doing this in the US they almost always start with cornstarch), mix it with an enzyme called a-amylase and heat it up. When the temperature gets high enough, the starch turns into a sticky paste called "starch glue." They then add glucoamylase to the starch glue, and 95 percent of the starch glue turns into liquid glucose. Next, you cool the liquid until crystals form. You'll get two products: crystalline glucose and glucose syrup. Both are easy to sell. They could do it by extracting glucose from foods that contain it, but the foods that contain glucose are more valuable than the glucose they contain. It's kinda silly to destroy $30 worth of grapes to get 25 cents worth of glucose.
Ores
The rocks have a high enough metal content to make them economically viable for extraction. The metal can be extracted and used for various industrial purposes. Extracting the metal from the rocks would be profitable.
Metallic ores are rocks that contain metals.Sometimes it contains a metal compound, like Hematite, an ore of Iron, Fe2O3, for example. They can also contain metals that are found in their pure form, like copper (which can form compounds, but not usually when found in ore) and Gold (which does not form compounds). This is known as a 'native' metal.
Any dimes minted before 1965 contain 90% silver and are at least worth the metal content.
The 1979 SBA dollar is very common has no silver and is $1.00
While all US nickels contain copper, none contain enough of the metal to appear coppery in color. Your coin was probably tarnished by exposure to heat, chemicals, or some other environmental contaminant; in that case it would only be worth 5 cents.
More than enough. Btw, Ppl remember him for his contribution to metal. Not how much he is worth.
It's only worth around 3-12 cents, depending on condition. It's not rare, and it doesn't contain valuable metal (just 2 cents' worth of copper).
War nickels contain about 1.5 gm of silver so they're worth about 1/20 of the current price of 1 oz of silver for the metal alone. A high-grade one can be worth up to $300 depending on condition.
It really depends on the content of metal and it's weight. There's not enough information given to answer this question.
There is a little in the solder, but typically not much. However they typically do contain gold and other precious metals but not in enough quantity to be worth going after unless you could process a bunch at the same time.
No, they do not contain any silver. Only nickels made from 1942 until 1945 contain silver.