Basic classification: Which of the following is an element (not a compound/mineral)? Identify the choice consisting of a single chemical element in its pure form. Choose the correct option.
General Knowledge
General Science
Difficulty: Easy
Choose an option
Answer
Correct Answer: Diamond
Explanation
Given data
- Options include gemstones and one elemental form.
Concept/Approach Diamond is pure crystalline carbon (an allotrope → element). Ruby/sapphire are corundum (Al2O3) with dopants; emerald is beryl (Be3Al2(SiO3)6).
Final Answer Diamond