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Radio Show & Podcast Feedback / Re: Discuss: The Sparkling Science of Gemstones
« on: 15/03/2018 07:14:21 »
A gemstone is a piece of mineral crystal which is cut and polished to form and used in making jewellery or other adornments. However, certain rocks or organic materials that are not minerals ( amber, jet) are also used for jewellery and are therefore often considered to be gemstones as well.
The colour of any material is due to the nature of light itself. A ruby appears red because it absorbs all the other colours of white light (green and blue), while reflecting the red. Also, ruby and sapphire have the same primary chemical composition but exhibit different colours because of impurities.
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The colour of any material is due to the nature of light itself. A ruby appears red because it absorbs all the other colours of white light (green and blue), while reflecting the red. Also, ruby and sapphire have the same primary chemical composition but exhibit different colours because of impurities.
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