Which of these methods is a reliable way to distinguish a natural pearl from a cultured one and a fake one?
- Rubbing the pearl on ones teeth
- X-ray examination
- All of these
- Microscopic examination
Answer
The correct answer is C) All of these.
More Science & Technology questions
- What is the name of the largest known pearl on the planet?
- What kind of pearls are the so-called Keshi pearls?
- In which of these places natural pearl hunting on a large scale has survived until modern times?
- In which of these unusual colors can natural pearls come?
- The B vitamins group was once thought to be a single vitamin. There are now eight officially recognized B vitamins referred to as vitamin B complex. Which of the following is not a vitamin from the B group?
- The vitamins from the B complex have many functions but generally play most important role in which of these processes of the human body?