Gold

1. Made of gold. He bought his girlfriend a heavy gold necklace.
2. Having the color of gold. My wife's wants a gold wristwatch, not silver.
3. A heavy yellow metal elemental metal of great value, with atomic number of 79 and symbol Au. Gold is about $1400 an ounce.
4. Anything or anyone considered to be quite valuable, An obedient son is as good as gold.