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Significados de corundum em inglês

russo
корунд
português
coríndon
espanhol
óxido de aluminio
catalão
corindó
Wikidata

Oxide mineral.

Termos relacionados
coríndon
português
coríndon
catalão
corindó

Very hard mineral used as an abrasive.

coríndon
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Uso de corundum em inglês
1
Sapphires are so hard because they are formed from corundum, an aluminium oxide.
BBC
2
So sapphire is 'dirty' corundum - corundum with a trace of iron and titanium.
BBC
3
In its natural state, it is the mineral corundum.
The Gutenberg Webster's Unabridged Dictionary: Section A and B
4
Herein also is the kind of corundum known as emery, and esteemed for its polishing properties.
How to See the British Museum in Four Visits
5
Oats and corundum both came according to prophecy.
Lippincott's Magazine of Popular Literature and Science, Vol. 22...
6
What is said of corundum and mica?
School History of North Carolina : from 1584 to the present time
7
And I should not be surprised if corundum could be found in those rocks back of the house.
Lippincott's Magazine of Popular Literature and Science, Vol. 22...
8
It was near the valley that Moynglass found his sample of corundum, with a ruby crystal in it.
The Hand in the Dark
9
Diamonds are pure carbon, but did you know that rubies and sapphires are corundum minerals-rareforms of alumina.
Let's Collect Rocks and Shells
10
The amount of raw corundum used annually by the company reaches nearly 1,000 tons.
Final Report of the Louisiana Purchase Exposition Commission
11
They're actually a synthetic corundum.
Wired
12
Of some of these minerals, as corundum and mica, North Carolina has already become the chief source of supply.
School History of North Carolina : from 1584 to the present time
13
Aluminium oxide or alumina, Al2O3, occurs in nature as the mineral corundum (q.v.
The Project Gutenberg Encyclopedia, Volume 1 of 28
14
The exhibit showed corundum in bulk, in large wheels, small wheels, hones, and every variety of grinding and sharpening specialties.
Final Report of the Louisiana Purchase Exposition Commission
15
There is no known substance, not even corundum, hard enough to resist the swift impact of myriads of little stones.
Among the Forces
16
It was mined in Sri Lanka's central district of Ratnapura and is a classified as a natural corundum un-heated blue star sapphire.
Reuters
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catalão
corindó
Corundum ao longo do tempo