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What is the hardest scale?

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.

simple.wikipedia.org - Mohs scale of mineral hardness - Simple Wikipedia

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Why is jazz called jazz?

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The mohs scale, named after Friedrich Mohs

Mohs' scale of mineral hardness is named after Friedrich Mohs, a mineralogist. Mohs scale is ordered by hardness, determined by which minerals can scratch other minerals.[1] Rocks are made up of one or more minerals. According to the scale, Talc is the softest: it can be scratched by all other materials. Gypsum is harder: it can scratch talc but not calcite, which is even harder. The hardness of a mineral is mainly controlled by the strength of the bonding between the atoms and partly by the size of the atoms. It is a measure of the resistance of the mineral to scratching, the Mohs scale is for natural minerals. For manufactured products other measures of hardness are better.[2] 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. Because the Mohs scale was made long ago, it is not exactly correct - for example, several minerals are now known to be harder than the diamond.[source?] The Mohs scale may not be perfect, but field geologists still find it very useful.

Relative hardness of some items [ change | change source ]

2.5 Fingernail

2.5–3 Gold, Silver

3 Copper penny

4-4.5 Platinum

4-5 Iron

5.5 Knife blade

6.5 Iron pyrite

5.5 Glass

6.5 Hardened steel file

[4]

How much does it cost to replace a key with a chip?

On average, programming and replacing a transponder key will cost $150 to $225 to replace.

Last updated May 7, 2021

What are the most romantic piano pieces?

12 Of The Most Romantic Piano Pieces Of All Time Ballade 1 in G Minor – Chopin. Moonlight Sonata – Beethoven. Liebestraume – Liszt. Moments...

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Why does tuning a piano cost so much?

Sometimes pianos require repairs before the technician can tune them. This includes replacing old or worn strings, correcting loose tuning pins, or repairing a damaged soundboard. The technician must correct these problems before tuning the piano, and the additional work increases the cost.

bankrate.com - How Much Does It Cost To Tune A Piano? | Bankrate.com

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Which is the hardest musical instrument to play?

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