As this is the official online store of The Tapri Store, we unconditionally guarantee that every item we sell is 100% authentic and that the materials used are true. Please note that we are unable to comment on the authenticity of any items not purchased from The Tapri Store. And also we do provide a warranty for our jewellery for a period of 6 months from the date of purchase. We will cover all types of repairs and polish issues free of cost during that period. However, if the product is crushed or completely tampered, we will not be able to help you.