Kundan is a traditional form of Indian gemstone jewellery involving a gem set with a gold foil between the stones and its mount, usually for elaborate necklaces.
Gold has unique physical chemical characteristics that made it very valuable. Gold is the most maleable and ductile of all the metals.
Jadau jewellery is basically jewellery made with gems, semi precious material, which are embedded into gold by heating the gold a little and then cooling the gold up. No adhesives, nothing is used.
Bangles are a type of rigid bracelet jewelry that today comes in many varieties, ranging from colorful plastic bracelets sold at chain stores to intricate, expensive gold jewelry.