Question
Which sentence is punctuated correctly?
• 1. When dinosaur bones become petrified, meaning their substance is replaced by a mineral deposit; they can often turn into colorful
• 2. Most gems are minerals that occur in different types of rock however, some gems are organic, meaning that they are produced by
plants or animals.
• 3. Precious metals, such as gold, silver, and platinum, used to be considered currency, but now are utilized most often as valuable and
expensive jewelry.
• 4. Organic gems are characterized as being softer and less durable, though they are still often used in jewelry or in other decorative
ways; some examples being pearls and shells.
Answer
Sentence 3 is punctuated correctly.