When you think of expensive gemstones, what comes to mind? Most people think of the Big Four: diamonds, emeralds, rubies and sapphires. However, it might surprise you to know that there are ...

The 1970s gave us plenty of iconic and unique collectibles, many of which have since shot up in value. From rare comics to ...

Travelers can dig up 66-million-year-old dinosaur fossils in New Jersey or mine for diamonds at an Arizona state park. See ...

Rarity Factor: The vibrant blue hue combined with exceptional purity makes it one of the rarest gemstones. Healing Properties: Symbolizes love, emotional balance, and self-empowerment. Ideal for ...

Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. But mining black opal isn't easy. After investing tens of thousands of ...

The shinier the pearl, the better. Black opal is one of the rarest gemstones in the world, sought after for its seemingly infinite display of colors, compared to common opal, which is usually one ...