Have enough goodwill to be trusted for buying a Gemstone like Diamond
Should be in the business of Gemstones for a considerable period of life.
Can give you value for money.
The people managing the store have knowledge of Gemology.
Once you have zeroed on a company that has all the above features then you have answer to your question "Where to Buy Heera in Delhi". I can give a simple answer to your question "Where to Buy Heera in Delhi" Just walk in Khanna Gems Private Limited owned store Gem Selections, Shop No.8, A-3 DDA Market, Janakpuri, New Delhi-110058 Mob:0091 9213932017