A worker looks at an emerald at the workshop of Muzo Emerald Company in Bogota, Colombia. Photo: AFP

Emeralds are miracles of nature, with special chemistry and ancient mystique

Gem specialist Helen Molesworth explains the formation of these prized stones and why they are so rare

Topic |   High Jewellery

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A worker looks at an emerald at the workshop of Muzo Emerald Company in Bogota, Colombia. Photo: AFP
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