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Ruby is the red variety of the mineral corundum.
The ruby s red color comes from trace amounts of the element chromium which replace aluminum in the mineral and change its color.
For example ruby and sapphire have the same primary chemical composition both are corundum but exhibit different colors because of impurities.
It has about 100 pages of basic gemstone information and about 200 pages dedicated to photos and descriptions of over 100 gems and gem materials.
A material which is mostly the same can exhibit different colors.
Gemstones of the world we highly recommend gemstones of the world by walter schumann.
Rubies are made from corundum a crystalline form of aluminum oxide.
However many famous genuine rubies have fascinating histories too.
As the science of gemology developed many historically important rubies such as the famed black prince s ruby of the british crown jewels proved to be other red gems most often red spinels.
In the past cabbed blood red gemstones were known collectively as carbuncles.
Find high quality fire red rubies stock photos and editorial news pictures from getty images.
A ruby appears red because it absorbs all the other colors of white light while reflecting the red.
It is one of the most popular gemstone books ever written with over one million copies sold.
Sapphire the other gem variety of corundum encompasses all colors of corundum.
Ruby stone isolated black ruby faceted garnet rubi diamond heart shaped stones vector art icon set gems silluette red diamond sparkle silhouette stone cut rubies.
Beside for its bright color it is a most desirable gem due to its hardness durability luster and rarity transparent rubies of large sizes are even rarer than diamonds.
Ruby is distinguished for its bright red color being the most famed and fabled red gemstone.
When corundum is red we call it ruby.
44 541 ruby stone stock photos vectors and illustrations are available royalty free.
When it s any other color such as blue yellow or pink we call it sapphire.
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Stock image by kellyplz 3 72 pooring wine stock photos by yanc 4 216 jewels stock photography by marti157900 20 1 081 round ruby stock photos by marisabell 9 253 chinese proverb about nature with a beautiful ruby throated hummingbird in motion in the garden pictures by kellyplz 2 219 golden ring red rubies picture by dennisvdwater 1.
