What color sapphire is the most expensive?

Related questions

1. Are sapphire diamonds real?
2. What does a sapphire engagement ring mean?
3. What does the color sapphire blue mean?
4. Which metal is best for blue sapphire?
5. What are the side effects of blue sapphire?
6. Are dark sapphires more valuable?
7. Are dark sapphires better?
8. What a sapphire means?
9. What makes a sapphire a sapphire?
10. Are sapphires worth more than diamonds?

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