Diamonds
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Watch: Jewellers make ring studded with over 50,000 diamonds, set new world record
Scroll Staff
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Video: Why Golconda diamonds were the most sought after jewels in the world until the 18th century
Ramakrishnan M
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Watch: A diamond battery might be able to power your phone all its life (in fact, over 5,000 years)
Scroll Staff
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How lab-made diamonds are stealing the shine (and market share) from natural ones
Paurav Shukla, The Conversation