Gems and Jewellery Industry

16. Which gemstone is known for its purple color and is associated with February?
a) Emerald
b) Sapphire
c) Opal
d) Amethyst

17. What is the traditional unit of weight for gemstones?
a) Carat
b) Gram
c) Ounce
d) Pound

18. Which gemstone is known for its orange color and is associated with November?
a) Emerald
b) Sapphire
c) Topaz
d) Citrine

19. Which organization is responsible for certifying the authenticity and quality of gemstones and diamonds in India?
a) GIA (Gemological Institute of America)
b) BIS (Bureau of Indian Standards)
c) IGI (International Gemological Institute)
d) GJEPC (Gem & Jewellery Export Promotion Council)

20. What is the process of setting gemstones into metal jewellery called?
a) Prong setting
b) Filigree
c) Granulation
d) Cloisonné