rutile

Noun

Meaning

A mineral usually of a reddish brown color, and brilliant metallic adamantine luster, occurring in tetragonal crystals. In composition it is titanium dioxide, like octahedrite and brookite.

Synonyms

Hypernyms

Examples

After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions may indicate that the stone has been treated. Source: Internet

All natural rubies have imperfections in them, including color impurities and inclusions of rutile needles known as "silk". Source: Internet

Titanium Dioxide R715 by Hangzhou Epsilon Chemical is an alumina zirconia treated rutile pigment, produced by chloride process. Source: Internet

Improvements used include color alteration, improving transparency by dissolving rutile inclusions, healing of fractures (cracks) or even completely filling them. Source: Internet

In 2005 the Republic of Sierra Leone in West Africa had a production capacity of 23% of the world's annual rutile supply, which rose to approximately 30% in 2008. Source: Internet

In the latter case, the mineral no longer has a silicate structure, but that of rutile (TiO 2 ), and its associated group, which are simple oxides. Source: Internet

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