Gems and Jewellery Industry

6. Which gemstone is known for its blue color and is associated with September?
a) Emerald
b) Sapphire
c) Opal
d) Amethyst

7. Which precious metal is commonly used in making jewellery alongside gold and silver?
a) Platinum
b) Copper
c) Aluminum
d) Zinc

8. What is the process of transforming rough diamonds into polished diamonds called?
a) Lapidary
b) Filigree
c) Enameling
d) Casting

9. Which gemstone is known for its green color and is associated with May?
a) Emerald
b) Ruby
c) Topaz
d) Peridot

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