New record set for world’s most heat resistant material. Researchers have discovered that tantalum carbide and hafnium carbide materials can withstand scorching temperatures of nearly 4000 degrees Celsius.

A measure of the ease with which a smooth surface of a mineral can be scratched, or of its resistance to abrasion….Definition.

Each mineral can be scratched by itself or any above it. None can be scratched by any below it. For example, topaz can scratch quartz, but it can’t scratch corundum. Talc can be scratched by everything, and nothing but diamond will make a mark on diamond.

Answer and Explanation: Objects that can scratch feldspar but not quartz would be those rated as a 7 on the Mohs hardness scale. This is because feldspar is a 6 on the scale, and quartz is a 7.

For example, your fingernail can scratch the minerals talc and gypsum, with a hardness of 2 or lower. A copper penny can scratch calcite, gypsum, and talc.

• The Strongest Natural Metal: Tungsten. As far as pure metals go, tungsten has the highest tensile strength, with an ultimate strength of 1510 megapascals.
• The Strongest Alloy: Steel.
• The Hardest Metal: Chromium.
• The Most Useful Strong Metal: Titanium.

What Is the Strongest Non-Alloy Metal in the World?

• Tungsten has the highest tensile strength of any natural metal, but it’s brittle and tends to shatter on impact.
• Titanium has a tensile strength of 63,000 PSI.
• Chromium, on the Mohs scale for hardness, is the hardest metal around.

francium

While platinum is often worth more than gold, it is also more likely to decrease in value at a moment’s notice. More recently, however, gold has been priced higher than platinum. Most well-informed investors look at the price differences between the two metals in order to understand trends.