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However, most fine specimens are carefully preserved by mineral collectors and rarely faceted. The dazzling gemstone Benitoite flawlessly completes the list of the world's rarest gemstones. Found only ...

Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones ... is one of the most enchanting stones in the world, sought after ...

Among the 10 most expensive diamonds ever sold in the world, pink diamonds account for half the list. All five of them have been sold within the last 10 years, according to Sotheby’s. The stone ...