Books tagged: refractive index

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Playing Around with Minerals & Gemstones
Price: $3.99 USD. Words: 16,020. Language: English. Published: September 4, 2014. Categories: Nonfiction » Education & Study Guides » Teaching methods & materials / science & technology
Ever thought about minerals? The fancy ones are gemstones. Are gemstones a safe store of wealth? Here is your chance to leap ahead of the pack and learn the gemstone jargon like a professional. The important aspects of natural diamonds, rubies and emeralds and their manmade equivalents are revealed as well as the mysteries of gemstone identification.