1. What are gem minerals primarily distinguished by?

2. Which gemstone owes its rich green coloration to trace amounts of chromium and vanadium?

3. Which country is NOT a prominent source of emerald?

4. What is the most desirable color for sapphires?

5. Which gemstone variety is known for its exceptional hardness and intense crimson hue?

6. What is the hardest naturally occurring mineral on the Mohs scale?

7. What property of gemstones is assessed using the Mohs scale?

8. Which gemstone property refers to its resistance to scratching and abrasion?

9. What is the measure of a gemstone's mass per unit volume?

10. Which property is evaluated using the ratio of a gemstone's density to that of water?

11. What is the main factor influencing the color of gemstones?

12. What refers to the presence or absence of internal and external flaws within a gemstone?

13. Which gemstone property relates to its shape, proportions, and faceting?

14. What property describes the degree to which light can pass through a gemstone?

15. Which unit is commonly used to measure the diameter of pearls?

16. What is the measure of a gemstone's resistance to fracture and deformation?

17. Which gemstone variety is known for its characteristic inclusions?

18. What property of gemstones refers to their ability to withstand exposure to environmental factors?

19. Which gemstone property evaluates the tendency of a gemstone to break along specific planes?

20. What unit is used to measure the weight of gold?

21. What is the highest karatage for pure gold?

22. Which gemstone is composed of carbon atoms arranged in a crystal lattice?

23. What is the measure of a gemstone's transparency?

24. Which gemstone variety is known for its intense blue color?

25. What is the ratio of a gemstone's density to that of water?

26. Which country is renowned for its Kashmir sapphires?

27. What property of gemstones is crucial for assessing their value?

28. Which gemstone is typically measured in carats?

29. What is the measure of a gemstone's mass per unit volume?

30. Which gemstone property evaluates resistance to scratching and abrasion?

31. Which gemstone variety is known for its characteristic green coloration?

32. What property of gemstones describes their resistance to fracture and deformation?

33. Which unit is used to measure the weight of pearls?

34. What is the measure of a gemstone's ability to withstand exposure to environmental factors?

35. Which gemstone variety is composed of beryl with trace amounts of chromium and vanadium?

36. What unit is used to measure the weight of gold?

37. Which gemstone property refers to the degree to which light can pass through a gemstone?

38. What property of gemstones is assessed using the Mohs scale?

39. Which gemstone variety is known for its exceptional brilliance, hardness, and rarity?

40. What is the primary factor influencing the color of gemstones?