How To Use corundum In A Sentence
- From Pliocene time the shallow emplacement of intrusive bodies resulted in thermal metamorphism (forming, for example, biotite, cordierite, andalusite, K-feldspar and corundum in pelites) and hydrothermal activity.
- Aluminum-silicon composite ultra-fine fume is a fume mineral additive with utility model patent, which won Fume Mineral Admixtures Extracted from Corundum Soot and Production of Synthetic Potash.
- Most natural corundum is of industrial quality, but transparent to translucent varieties with their adamantine to vitreous luster potentially yield gemstones.
- The natural materials include the minerals staurolite, quartz, diamond and corundum. Garnet
- The same tendency to rely upon color causes many in the trade to call all yellow stones "topaz" whether the species be corundum (oriental topaz), true topaz (precious topaz), citrine quartz (quartz topaz), heliodor (yellow beryl), jacinth A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public
- Then we have the "amethyst" sapphire, which varies from a red to a blue purple, being richer in colour than the ordinary amethyst, which is a form of violet-coloured quartz, but the corundum variety, which, like its companions, is called the "oriental" amethyst, is both rarer and more precious. The Chemistry, Properties and Tests of Precious Stones
- Some representative oxide minerals include corundum, cuprite, and hematite. Composition of rocks
- Diamond has been assigned a hardness value of 10, only a single point higher than corundum on Mohs scale, although it is far harder than this would indicate.
- In crystal form, aluminum oxide is called corundum, sapphire or ruby (depending on the color), and it is among the hardest substances known. Rusting Aluminum « Isegoria
- He also found particles of gemstones such as corundum, garnet, rutile, and argentite.
