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Corundum: alternatives and connections

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Corundum

The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.

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Reviewed alternatives and contrasts

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Narrower term 3

Alumina 76% connected

One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.

oewn 2023 0% interchangeable

Open English WordNet identifies the related term as a narrower or more specific lexical category.

Ruby 76% connected

A precious stone of a carmine red color, sometimes verging to violet, or intermediate between carmine and hyacinth red. It is a red crystallized vari…

oewn 2023 0% interchangeable

Open English WordNet identifies the related term as a narrower or more specific lexical category.

Sapphire 76% connected

Native alumina or aluminium sesquioxide, Al2O3; corundum; esp., the blue transparent variety of corundum, highly prized as a gem.

oewn 2023 0% interchangeable

Open English WordNet identifies the related term as a narrower or more specific lexical category.

Broader term 1

Mineral 76% connected

An inorganic species or substance occurring in nature, having a definite chemical composition and usually a distinct crystalline form. Rocks, except…

oewn 2023 0% interchangeable

Open English WordNet identifies the related term as a broader lexical category for at least one sense.

Containing substance 1

Emery 70% connected

Corundum in the form of grains or powder, used in the arts for grinding and polishing hard substances. Native emery is mixed with more or less magnet…

oewn 2023 0% interchangeable

Open English WordNet identifies the related term as a containing group, substance or whole.

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