Pure corundum and beryl are colorless ... You can take delight in the amazing colors of the gemstones, but through chemistry, you can also see how nature creates those colors using an endless ...

Pure corundum and beryl are colorless ... You can take delight in the amazing colors of the gemstones, but through chemistry, you can also see how nature creates those colors using an endless variety ...

Pure corundum and beryl are colorless ... You can take delight in the amazing colors of the gemstones, but through chemistry, you can also see how nature creates those colors using an endless ...

Pure corundum and beryl are colourless ... You can take delight in the amazing colours of the gemstones, but through chemistry, you can also see how nature creates those colours using an endless ...

Rubies and emeralds have the colors they do because, like many substances, they absorb some colors of light. Most visible light, like sunlight, is composed of all the colors of the rainbow: red, ...