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 ...

Following is a transcript of the video. 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.

Crystals are admired for their beauty and healing properties. Rare stones like Blue Diamond, Pink Star Diamond, and Jadeite ...

The recent Knight Frank Luxury Investment Index highlights the growing appeal of precious stones, diamonds and coloured ...

Through her gem portfolios, Hangartner works with clients to use gemstones for wealth preservation. With the diamond market in turmoil, only exceptional stones in size and quality, especially coloured ...

Found by a metal detectorist in England, the item features a sapphire surrounded by two emeralds and two stones that are ...

Known for its deep red hue, rubies are highly prized and valued at around $4,625 per carat. One of the hardest and most sought-after gemstones, diamonds cost approximately $9,502.13 per carat. A light ...