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Sapphire

Sapphire

Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide ( Al 2 O 3) with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium.It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors.

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Papua New Guinea Profile   Nationwide PNG Pages

Papua New Guinea Profile Nationwide PNG Pages

Resources. Papua New Guinea is rich in natural resources. There are extensive reserves of natural gas and oil, as well as huge mineral deposits of copper and gold.

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Geography of China

Geography of China

China originally had an estimated number of 50,000 rivers. However, due to statistical discrepancies, water and soil loss, and climate change, there are currently only an estimated 22,000 rivers remaining. The rivers in China have a total length of 420,000 kilometers. 1,500 have a catchment area exceeding 1,000 square kilometers.

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The World Factbook  Central Intelligence Agency

The World Factbook Central Intelligence Agency

The Office of Public Affairs (OPA) is the single point of contact for all inquiries about the Central Intelligence Agency (CIA). We read every letter, fax, or e mail we receive, and we will convey your comments to CIA officials outside OPA as appropriate.

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South America  Chile  The World Factbook   Central

South America Chile The World Factbook Central

A NASA image taken on the morning of 6 June 2011 shows a large ash plume emanating from Chile's Puyehue Cordon Caulle volcano. Reaching an altitude of approximately 12,000 15,000 m (40,000 45,000 ft), the ash cloud drifted north along the Andes.

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