The mark-up factor, sometimes called the keystone or the markup multiple, is the multiplier a jeweller applies to landed cost to arrive at the price at which a piece of jewellery is offered to the consumer. It is not a margin in the financial sense but its inverse-style cousin, and the two are routinely confused in the trade. Cost multiplied by the mark-up factor gives the retail price; gross margin is then expressed as the difference between retail price and cost as a percentage of retail price.

Typical ranges

In the North American independent jewellery trade, mark-up factors on stocked fine jewellery have historically ranged between 2.0 and 3.5, sometimes higher for fashion silver and lower for high-ticket bridal. A factor of 2.0 is referred to as keystone and corresponds to a 50 percent gross margin. A factor of 2.5 corresponds to a 60 percent gross margin, and a factor of 3.0 corresponds to a 67 percent gross margin. Mass-market bridal and online specialists often operate at factors between 1.3 and 1.6 on diamond centres, with a higher mark-up applied to mountings and labour.

Coloured-stone retail typically supports higher factors than diamond retail because coloured stones are less price-transparent. Designer-signed jewellery and high-end maisons can sustain factors of 4.0 or more, reflecting brand equity, store rent in flagship locations, and slower stock turn.

Components of cost

What is included in cost matters as much as the factor itself. A defensible mark-up calculation includes the landed cost of the loose stones, the manufacturing cost of the mounting, any customs duties and freight, and an allocation for stones that fail quality control or settings that need rework. A jeweller who marks up only the loose stone cost, ignoring labour and overhead, will under-price relative to a competitor who marks up the fully landed cost, even if both quote the same factor.

Negotiation

For the consumer, the mark-up factor is the structural reason that posted prices on stocked goods are negotiable in independent stores. A jeweller working at a 3.0 factor has substantial room to discount on a one-off transaction without sale becoming unprofitable. The same flexibility is generally not present at maisons or in commission-driven mass-market chains, where prices are administered centrally.

Buyers who want to assess whether a price is reasonable should look for documentation: a third-party laboratory report on any centre stone, a written appraisal from a credentialled appraiser, and, on bespoke work, a written breakdown of the metal weight, stones, and labour. The mark-up factor itself is a private number for the trade, but the components on which it is calculated should not be.