Valuation – Summary

Unit 11: Valuation – Understanding Gem Value

How much is that gemstone worth? These words help us understand what makes gems valuable.

• Four Cs – Four main things (color, clarity, cut, carat) that show a gem’s worth.
• Body color – The main color of a gem, like red or blue.
• Tone – How light or dark a gem’s color is.
• Saturation – How strong or vivid a gem’s color is.
• Blemishes – Marks or flaws on a gem’s surface.
• Hall of mirrors – A way to describe how light bounces inside a gem.

International Gem Society

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