Three numbers make the price, and only one is negotiable
A jewellery estimate is built from metal, labour and stones. The metal component is weight multiplied by a published rate, which the jeweller does not control. The stone component is a valuation supported by weight, quality description and often certification. What remains is making charges, and that is the entire space in which a jeweller competes on price.
This is why an unitemised estimate is such a weak document. When the customer sees only a total, every competitor looks cheaper for reasons the customer cannot examine, and the salesperson has nothing to argue with except a discount. When the composition is visible, the conversation moves to the one component that is genuinely different between two shops, which is exactly where a good jeweller wants it.
