from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A lustrous red, reddish-brown, or black mineral, TiO2, used as a gemstone, as an ore, and in paints and fillers.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The most frequent of the three polymorphs of titanium dioxide, crystalizing in the tetragonal system, TiO2.
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. One of the three forms in which titanium dioxid occurs in nature. (See also octahedrite and brookite.)
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a mineral consisting of titanium dioxide in crystalline form; occurs in metamorphic and plutonic rocks and is a major source of titanium
The star sapphire does, not the rutile that causes it.
A recent increase in political stability has led to a revival of economic activity such as the rehabilitation of bauxite and rutile mining.
Most heavy-mineral sands also have a high content of titanium-bearing minerals, such as ilmenite and rutile.
The sand is siliceous and, as with other sand masses on the New South Wales north coast, contains significant quantities of the heavy minerals rutile, zircon and ilmenite.
Grains of other weathering-resistant minerals (such as garnet, rutile, ruby, sapphire, zircon, etc.) are often found in quartz sand as well.
Mining of bauxite and titanium dioxide (rutile) in the southeast has resulted in forest loss, with the subsequent dredging leaving large bodies of deep water polluted with heavy metals.
Ilmenite (FeTiO3) and rutile (TiO2) are the most important sources of titanium.
The estimated resources of rutile in the world contain about 230 million tons of titanium dioxide.
"The quartzite shows granoblastic and blastopsammitic texture, with grain sizes varying from coarse sand to very fine pebble and with minor microcrystals of sericite, fuchsite, andalusite and iron oxide, besides detrital tourmaline, rutile, and zircon." link
They are seeking to mine "degraded land forms" - former agricultural land, now badly eroded - behind the beach area, for heavy minerals including ilmenite, rutile and zircon.
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