Ans: Gem Stones:
. Gem stones (excluding Diamond and Opal) are also being mined at different
sites. Most well-known among these are Emerald.
. Pakistan is the fifth largest producer of Emerald in the world. Biggest
Emerald mine is at Gujjar Killi (Swat-KPK) at a height of 7000 feet.
. Ruby, Topaz and Quartz are other important varieties of gem stones found in
Pakistan.