Corundum

Corundum especially the ruby variety in Myanmar may not have huge marketing campaigns behind its sale, but it's just as destructive as that blue diamond.

diamonds are for never - Anil Dash 2003

Placing the sand belt of medium Corundum EK 25 or EK 32.

Chapter 6 Johannes Schollbach 1993

Silex Corundum appeared to understand, and he indicated that the unfortunate man would receive attention.

Through Space to Mars Or the Longest Journey on Record Roy Rockwood

Corundum and pure emery are ores that are very rich in aluminum, containing about fifty-four per cent.

Scientific American Supplement, No. 531, March 6, 1886 Various

"Probably telling his people about us," replied Mark, and this seemed to be so, for Silex Corundum, as they later learned was the name of the ruler of Mars, frequently motioned toward the adventurers, who stood in a group in front of the platform.

Through Space to Mars Or the Longest Journey on Record Roy Rockwood

The Corundum group embracing the Ruby, Sapphire, etc.

The Chemistry, Properties and Tests of Precious Stones John Mastin

Corundum of fine blue color is known as "_sapphire_."

A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Frank Bertram Wade

Corundum (the yellow variety known as "Oriental Topaz" [not "Topaz"], see below) 9 3. 90-4.16

The Chemistry, Properties and Tests of Precious Stones John Mastin

"I understood that the ruler, Silex Corundum, always went at the head of the troops when there was to be a battle, but there's a different person now."

Through Space to Mars Or the Longest Journey on Record Roy Rockwood

Corundum is a product of contact metamorphism and also a result of direct crystallization from molten magma.

The Economic Aspect of Geology 1915