46. Which organization is responsible for certifying the authenticity and quality of gold jewellery 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)
47. Which gemstone is known for its deep red color and is associated with January?
a) Emerald
b) Sapphire
c) Ruby
d) Garnet
48. Which term refers to the process of adding tiny beads or wires of metal to a jewellery design?
a) Filigree
b) Soldering
c) Casting
d) Polishing
49. Which gemstone is known for its iridescent play of colors and is associated with October?
a) Emerald
b) Sapphire
c) Opal
d) Tourmaline
50. What is the term for a gemstone that has not been cut or shaped?
a) Cabochon
b) Faceted
c) Tumbled
d) Rough
