Discover the history and significance behind some of the most expensive gemstones, from the legendary Hope Diamond to the Cullinan II.
Learn how gemologists determine the value of precious stones based on color, clarity, cut and carat weight.
Understand the chemical properties and uses of different metals, from gold and platinum to copper and iron, that set precious metals apart.
Examine the growing popularity of platinum in jewelry, industry and investments, including its unique properties and price trends.
