Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. A scratch test developed by a German mineralogist Fredriech Mohs in 1822 is used to determine mineral hardness.

You can identify a mineral by its appearance and other properties. The color and luster describe the appearance of a mineral, and streak describes the color of the powdered mineral. Each mineral has a characteristic density. Mohs Hardness Scale is used to compare the hardness of minerals.

Mineralogists are scientists who study minerals. One of the things mineralogists must do is identify and categorize minerals. While a mineralogist might use a high-powered microscope to identify some minerals, most are recognizable using physical properties.

Diamond is always at the top of the scale, being the hardest mineral. There are ten minerals in Mohs scale, talc, gypsum, calcite, fluorite, apatite, feldspar, quartz, topaz, corundum, and for last and hardest, diamond.

Iron and Steel, aluminum, Copper, Zinc, Lead, Cadmium, Manganese, and Magnesium are some of the cheapest metals found. aluminum is the most abundant metal on the planet. It is a bit costly to get it in pure form.

In raw materials costs, aluminium is about three times more expensive than steel, while in terms of conversion costs it is about twice as expensive, MIT said. And in assembly costs, aluminium was 20-30% more expensive than steel.

Answer. Answer:Alloy steel can be relatively inexpensive to produce, making it very widely used. Stainless steel is a highly corrosion-resistant alloy steel that consists of iron, carbon, significant amounts of chromium and residues of other metals. It is a versatile material widely applied in many households.

Thousands of years before them, another metal, iron, was eight times more valuable than gold. It could only be found in its pure metal form in iron meteorites. Iron eventually became the least expensive metal on Earth. That’s because iron, as found in ores, is our most plentiful element by mass.

Antimatter

The metal is abundant enough to create coins but rare enough so that not everyone can produce them. Gold doesn’t corrode, providing a sustainable store of value, and humans are physically and emotionally drawn to it. Societies and economies have placed value on gold, thus perpetuating its worth.

The U.S.

In most ancient cultures gold was popular in jewellery and art because of its value, aesthetic qualities, ductility and malleability. The value and beauty of gold made it an ideal material for particularly important political and religious objects.