Photo by robert weldon gia. Corundum is an aluminum oxide that commonly forms hexagonal barrel shaped prisms that taper at both ends or as thin tabular hexagonal plates. Corundum is a mineral species that includes two world s most precious gemstones ruby and sapphire. Corundums ruby and sapphires occur in all colors of the spectrum and have remained popular gemstones from ancient times to the present day. Ruby and sapphire usually blue but also in every other color have been the most important colored gemstones for several thousand years.
What is corundum and what are its basic qualities. The gemstone applications of the corundum varieties are discussed in greater detail in their own dedicated gemstones pages. From ancient times it has been considered as a gemstone to feel the joy of life. Most corundum is opaque to translucent and heavily included suitable only for industrial use including the production of abrasives used for sandpaper and machining of metal plastics and wood and as of recently has become very important in the making of mobile phone components. About corundum gemstones corundum itself is not a very rare mineral but transparent gem quality corundum is extremely rare.
A rare type of sapphire padparadscha sapphire is pink orange. Corundum is used as a gemstone abrasive refractory and much more. You can have more relaxed mind from richness. Rubies are red due to the presence of chromium and sapphires exhibit a range of colors depending on what transition metal is present. Corundum has some electrical uses and non gem material such as emery is used as an abrasive because of its high hardness.
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Padparadschah is the name given to the orange yellow sapphire a gem variety of corundum. It would attract success and prosperity by using it. Click the pictures to get full data click the x to remove the gem from the list. Corundum has two primary gem varieties. Red corundum is a ruby blue is a sapphire any other color is a fancy sapphire.
Synthetic corundum is used instead of natural corundum in most applications. Corundum gemstones minerals. It has a hardness of 9 on the mohs scale making it one of the most durable commercial gemstones. Since they are the same mineral sapphire and ruby are often found together. Corundum is very compact dense and lacks gemstone cleavage.
It s also the second hardest natural mineral after diamond. Sapphire is far more common variety as ruby requires a specific element and an appropriate host rock to supply its essential chromium. It s also the second hardest natural mineral after diamond. Synthetic corundum is used instead of natural corundum in most applications. Padparadschah is the name given to the orange yellow sapphire a gem variety of corundum.
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Sapphire is far more common variety as ruby requires a specific element and an appropriate host rock to supply its essential chromium. Gem quality corundum is also quite rare. A rare type of sapphire padparadscha sapphire is pink orange. What is corundum and what are its basic qualities. Photo by robert weldon gia.
