What Is a Troy Ounce?
A troy ounce is the standard weight unit used for precious metals and is different from a standard ounce.
EDUCATION
Learn About Gold
Build a strong foundation in gold terminology, purity, pricing and markets.
Gold Basics
- What is gold?
- Why is gold valuable?
- How is gold measured?
- What is a troy ounce?
Purity & Karats
- 24K, 22K, 21K and 18K
- Fineness
- Hallmarks
- Gold alloys
Gold Markets
- Spot price
- Premiums and spreads
- Currency effects
- Interest rates and gold
Core guides
What Does 24K Gold Mean?
Karat describes the proportion of gold in an alloy. Higher karat generally means a higher proportion of gold.
Why Does the Price of Gold Change?
Gold prices can respond to interest-rate expectations, currencies, investment demand, central-bank activity and physical demand.