Firstly, Polki is a kind of jewellery, which uses uncut diamonds, precious and semi-precious stones. As a matter of fact, these stones have an open setting and are not covered with gold at the back. For instance, this is done to reflect more light and sparkle.
Available at Jaipur:- Shri Jewellers, Jaipur Gems, Suranas(Jaipur), Tribhovandas Bhimji Zaveri, Kuber Tholia, Birdhichand Ghanshyamdas Jewellers, Amrapali, Khanna Jewellers,
Polki Jewellery available in Delhi at:- P.P. Jewellers, The Bikaner state, Khanna Jewellers, Hazoorilal and Sons Jewellers Pvt. Ltd, Mehrasons Jewellers, Amrapali Jewels, Hazoorilal and Sons Jewellers Pvt. Ltd.
Available at Kolkata:- Bhuramal Rajmal Surana
While polki is uncut diamond jewellery, Kundan is layers of cut glass jewellery.
Necklaces, bracelets and earrings are available in all the leading gold & diamond jewellery stores. However, Polki jewellery is much more expensive that Kundan jewellery. In other words, one being real diamonds and Kundan being glass. For example, Polki jewellery was brought to India by the Moghuls.
Large uncut Diamond stones are set on gold foils that is typically painted. The reflection of light on the diamond is important and hence they are carefully set. Rubies and emeralds are added to this type of jewellery to add more elegance and appeal. Kundan involves layers of glass painstakingly placed one on top of the other. The reverse side has enamel work on them.
Both the types of jewellery are available imitation jewellery shops as well.