6. Which gemstone is known for its blue color and is associated with September?
a) Emerald
b) Sapphire
c) Opal
d) Amethyst
Answer: b) Sapphire
7. Which precious metal is commonly used in making jewellery alongside gold and silver?
a) Platinum
b) Copper
c) Aluminum
d) Zinc
Answer: a) Platinum
8. What is the process of transforming rough diamonds into polished diamonds called?
a) Lapidary
b) Filigree
c) Enameling
d) Casting
Answer: a) Lapidary
9. Which gemstone is known for its green color and is associated with May?
a) Emerald
b) Ruby
c) Topaz
d) Peridot
Answer: a) Emerald
10. Which organization is responsible for setting international standards for diamonds?
a) GIA (Gemological Institute of America)
b) BIS (Bureau of Indian Standards)
c) IGI (International Gemological Institute)
d) HRD Antwerp
Answer: a) GIA (Gemological Institute of America)
