C) To check for hardness for daily wear
Jewelers use the Mohs scale to determine a gemstone’s hardness — its resistance to scratches. This helps them decide if a stone is durable enough for everyday use in rings, bracelets, or other jewelry that might get bumped or scratched. For example, diamonds (hardness 10) are great for daily wear, while opals (around 5.5–6.5) are more delicate and may need protective settings.
So, while scratching is part of the test (Option B), the ultimate goal is assessing durability for jewelry (Option C).
Kelvin, well done again❗ Your paper always covers the other option too which is very impressive❗❗
Thanks, Kelvin❣☘