Question

Give two reasons why a gold ring is not made of 100% gold.

Answer 1

1. Gold is soft like lead.

2. Pure gold isn't durable, and wouldn't last, nor would you be able to keep it on your finger since it's so soft. If you're gonna wear a ring for a life-time, it has to have durability.

Answer 2

Gold is extremely malleable in its purest form, so a 24-carat (pure) gold ring would be very easy to get dented and squashed during the time that it is being worn.
It is also extremely expensive to process gold to its purest form, so pure gold jewelry would be ridiculously expensive, to the point of no demand.
Hope that helped =)