Gold is also found in lead and zinc ores with an average content of 0.8 grams per ton.

Zinc ores continue to be the primary source of indium, where it is found in compound form.

Thallium can also be obtained from the smelting of lead and zinc ores.

It is also involved in the exploration for new minerals deposits, with a focus on gold, silver, lead, and zinc ores.

In China, bismuth is also found in tungsten and zinc ores.

Zinc ores are the main source of indium.

Zinc ores were used for making brass in ancient times, but zinc was not recognized as a distinct element.

There are also deposits of lead and zinc ores, brown coal, gold dust, and boric raw materials.

It occurs as an oxidation product of zinc ores and as post mine incrustations.

The production for sulfidic zinc ores produces large amounts of sulfur dioxide and cadmium vapor.

Cadmium occurs as a minor component in most zinc ores and therefore is a byproduct of zinc production.

Cadmium is a common impurity in zinc ores, and it is most isolated during the production of zinc.

Kenitra has grown rapidly to be a shipping centre for agricultural produce (mainly fruit), fish, timber, and lead and zinc ores.

The main yields were lead and zinc ores, in particular galena, blende, cerussite and gossan.

The mine was worked on and off with various changes in operation, and under different owners, with lead, barium and zinc ores being extracted.

The chain is shortest in sodium ethyl xanthate that makes it highly selective to copper, nickel, lead, gold and zinc ores.

As part of the extraction process, zinc ores are usually roasted to convert the zinc in the ore into zinc oxide.

Zinc ores were used to make the zinc-copper alloy brass many centuries prior to the discovery of zinc as a separate element.

The municipality is rich in lead and zinc ores and mining is the backbone of the economy, employing 1/3 of the working population.

In some areas the Carboniferous Limestone and the dolomitic conglomerate have been mineralised with lead and zinc ores.

However, aluminum base scrap and lead and zinc ores rose more slowly, and prices turned down for raw cotton and copper base.

It is usually obtained by dissolving zinc in sulphuric acid, or by roasting and oxidizing certain zinc ores.

Since cadmium compounds are often found in association with zinc ores, cadmium oxide is a common by-product of zinc refining.

Throughout the 18th, 19th, and 20th centuries, Sussex County's economy was largely centered around agriculture and the mining of iron and zinc ores.