Diamond supplier to independent jewellers

Supply certified and matched diamonds to small jewellers and makers who don't hold their own stock.

Loose cut diamonds spread on a dealer's velvet tray under light.
Startup cost£5k to £25k
Monthly revenue£3k to £15k
Time needed15+ h/week
First incomeMonths
  • £5k-25k
  • Part-time
  • From home

Estimates for a small start in the UK, not guarantees.

Official data

3,186 UK companies in this field, 40% registered in the last 2 years

SIC 46480 “Wholesale of watches and jewellery”. Source: Companies House, November 2026.

What it is

A trade dealer who sources loose diamonds, including calibrated and matched stones, for independent jewellers, bespoke makers and small retailers. You hold a modest range and source specific stones on request.

Your first three steps

  1. Make a list of independent jewellers and makers in your region and learn what stones they buy
  2. Agree credit or memo terms with wholesalers so you can offer a range without tying up all your cash
  3. Visit trade contacts with a small selection of certified stones and a clear price list
Who pays

Independent jewellers, designer-makers, small online jewellery brands and repair workshops.

How it makes money

You sell stones at a trade margin over your buying price. Regular repeat orders and sourcing requests are the main income.

Skills that help
  • Strong diamond grading knowledge
  • Negotiating with suppliers
  • Building long-term trade relationships
Watch out for
  • Anti-money laundering rules: check whether you need to register with HMRC and what customer checks apply
  • Trade credit risk, so check how you handle late payment and returns on approval stones
  • Check sourcing, sanctions and disclosure rules for natural, lab-grown and treated diamonds
  • Stock and transit insurance, and secure delivery when posting or couriering high-value items
  • Margins can be thin and prices move, so avoid holding more stock than you can fund

Deep research report · UK

Everything you need to start: diamond supplier to independent jewellers

Researched with live web search for United Kingdom: real startup prices, the licences and rules, what others charge, a break-even example, how to find your first customers and a 30-day launch plan. With sources.

  • Startup costs with real prices
  • Licences, registration and rules
  • Pricing: what others charge
  • Break-even example
  • Finding your first customers
  • 30-day launch plan
  • Risks and how to reduce them
Ready in about 2 minutes · one-off payment, tax included

See a full sample report

Questions people ask

How much does it cost to start a diamond supply business?

Estimates suggest startup costs are typically around £5,000 to £25,000, depending on the range of stones you hold and how you fund stock. Sourcing stones on request rather than holding them may change what you need.

How much can a trade diamond supplier earn?

Estimates suggest monthly revenue is typically around £3,000 to £15,000, depending on the number of jewellers you supply and the value of the stones sold. The estimates start from around 15 hours a week.

What should I check before supplying diamonds to the trade?

Check whether you need to register with HMRC and what customer checks apply under anti-money laundering rules. Also check sourcing, sanctions and disclosure rules, how you handle late payment and returns, and stock and transit insurance.

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