mehbridezilla Well lets hope the marriage lasts a lot longer than the ring;!
Well the sale of goods act applies here, goods being of "merchantable quality" which this is not. I think that you are obliged to ask the retailer who sold it to you to repair it or if no repair is possible then to replace it.
I think, tho I might be be wrong, that you can't initially ask for a full refund. You can of course ask, and if the retailer sees fit he can refund you but you must give him chance to repair first.
www.legislation.gov.uk/ukpga/1979/54
Here's part of the act. Section 14 also applies to
(1)If section 48A above applies, the buyer may require the seller—
(a)to repair the goods, or
(b)to replace the goods.
(2)If the buyer requires the seller to repair or replace the goods, the seller must—
(a)repair or, as the case may be, replace the goods within a reasonable time but without causing significant inconvenience to the buyer;
(b)bear any necessary costs incurred in doing so (including in particular the cost of any labour, materials or postage).
(3)The buyer must not require the seller to repair or, as the case may be, replace the goods if that remedy is—
(a)impossible, or
(b)disproportionate in comparison to the other of those remedies, or
(c)disproportionate in comparison to an appropriate reduction in the purchase price under paragraph (a), or rescission under paragraph (b), of section 48C(1) below.