Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
A hardness of 7 indicates that rose quartz is capable of scratching glass and softer minerals, but it can still be scratched by harder materials like corundum (which includes sapphires and rubies) and diamond.
Source: https://www.freepressjournal.in/weekend/rose-quartz-gemstone-of-self-love-and-empathy
He expressed worry about the quality of ground water in some parts of the country, saying at least 30 per cent of such water sources had high levels of iron, manganese, fluoride, arsenic and hardness.
Source: https://www.ghanaiantimes.com.gh/180-rural-cnities-to-benefit-from-gh%c2%a2690m-cwsa-water-projects/
It includes heating the sharp edge to high temperatures and afterward cooling it to make differential hardness.
Source: https://newsonjapan.com/html/newsdesk/article/138586.php
The Mr.Shield three-pack of tempered glass screen protectors offers impressive value, with 9H hardness ballistic Japan Glass for maximum strength against impacts and scratches.
Source: https://www.digitaltrends.com/mobile/best-samsung-galaxy-s23-screen-protectors/
Tooth enamel ranks somewhere between steel and titanium in terms of hardness, but its strength comes from the mineral content, especially the calcium, and this is leached out by acids.
We learn, too, of the Mohs Scale that judges hardness, a logarithmic affair where diamond (at the top, scoring 10) can scratch corundum (nine) all the way down to talc (one).
With its resistance of 223 Vickers, this alloy is 50-per-cent more resistant to abrasion than conventional steels and has a unique hardness.