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· 7 min read

Do Canadian Jewellers Price Diamonds in USD? What to Ask

Do Canadian jewellers price diamonds in USD? Often yes, at the wholesale level. Here is how the conversion works, what it costs you, and what to ask.

Most Canadian jewellers buy loose diamonds priced in US dollars, then sell them to you in Canadian dollars. The wholesale trade runs on USD price lists regardless of where the shop sits, so the CAD number on your quote is almost always a converted number with a margin and an exchange-rate assumption baked into it. That conversion is where a quiet few hundred dollars can appear, and it is the part almost nobody asks about.

Where the USD price actually comes from

The reference point for natural diamond wholesale pricing is the Rapaport Diamond Price List, which Rapaport describes as "the international benchmark used by dealers to establish diamond prices in all the major markets." Rapaport's own trade documentation states that "All prices in USD," that the indexes are "in hundreds of dollars per carat," and that the list is "Published Weekly: Every Thursday at midnight (NY time)." As of September 2026 that documentation says the list covers round and pear shapes from 0.01 to 10.99 carats.

Two honest caveats that the trade often skips over. First, Rapaport is explicit that "This is not a record of actual transaction prices, but a benchmark reflecting seller asking prices in cash deals (no memo, returns, or terms)." Second, Rapaport's own page notes that "Most diamonds trade 10-30% below Rapaport." So a jeweller quoting you "20% back of list" is describing a discount off an asking-price sheet, not off a market clearing price. It is a negotiating language, not a valuation.

Lab-grown diamonds are also quoted in USD through the supply chain, but they have no equivalent benchmark with the same standing, and prices have moved far faster than natural. Be more sceptical of any "percent off list" framing on a lab-grown stone, because the list it is discounting is less well established.

What happens between the USD wholesale price and your CAD total

The chain is short but each link adds something:

  1. A supplier quotes the stone in USD, per carat, times the carat weight.
  2. The stone is shipped to Canada. Under the Currency Exchange for Customs Valuation Regulations (SOR/85-900), the value for duty is converted at the rate prevailing on the date of direct shipment to Canada, and CBSA Memorandum D13-2-3 specifies that this is "the Bank of Canada rate prevailing on the date of direct shipment of the goods to Canada."
  3. The jeweller's bank settles the payment at a commercial rate, not the Bank of Canada rate.
  4. The jeweller picks a CAD selling number, which folds in the FX cost, a buffer against the rate moving, and margin.
  5. GST or HST is applied at your provincial rate on the CAD total.

Step 2 is the only link governed by a published rule. Steps 3 and 4 are business decisions, and they are where the variation between shops lives.

The exchange rate is a choice, not a fact

There is no single "the" USD/CAD rate. The Bank of Canada publishes a daily average rate once each business day by 16:30 ET, and states plainly that "All Bank of Canada exchange rates are indicative rates only, obtained from averages of aggregated price quotes from financial institutions." On 25 September 2026 that published rate was 1.4145 CAD per USD.

Nobody transacts at 1.4145. Banks add a spread, and a jeweller holding a USD-denominated stone for weeks carries real rate risk. A modest buffer is legitimate. The problem is that the buffer is invisible, so it is easy to stretch.

Here is the arithmetic on a USD $4,200 stone, using the 25 September 2026 published rate as the baseline. These are illustrative conversions, not quoted prices:

Rate appliedEffective markup over published rateCAD before taxExtra vs. baseline
1.4145 (Bank of Canada, 25 Sep 2026)—$5,940—
1.43571.5%$6,030+$89
1.44992.5%$6,090+$149
1.47114.0%$6,179+$238

On a USD $12,000 stone, that same 4% spread is roughly $680 CAD before tax. It is not catastrophic, and it is not nothing. It is about what a colour grade step costs at that size.

Why the spread is easy to hide

Because the stone's USD price and the rate are multiplied before you ever see a number, a wide rate and a thin margin look identical to a fair rate and a fatter margin. You cannot separate them from the final figure. That is why the useful question is not "what is your margin" but "what USD price and what rate did you use."

What Canadian law does and does not require here

The Competition Act, R.S.C. 1985, c. C-34, prohibits a supplier who "makes a representation to the public that is false or misleading in a material respect" under subsection 74.01(1)(a). The Competition Bureau's guidance on false or misleading representations, last modified 25 November 2024, explains that a court will consider "both the literal meaning of the information and the general impression it makes," known as the general impression test, and that "it is unnecessary to show that someone was deceived or misled."

Subsection 74.01(1.1) is the drip pricing provision: "the making of a representation of a price that is not attainable due to fixed obligatory charges or fees constitutes a false or misleading representation, unless the obligatory charges or fees represent only an amount imposed on a purchaser of the product ... by or under an Act of Parliament or the legislature of a province." Sales tax is carved out. A conversion fee bolted on at checkout is not.

What the law I have read does not do is dictate a currency. Nothing in those provisions says a Canadian retailer must display prices in CAD. The general impression test is the constraint that matters: if a site shows "$4,200" without saying which dollar, and the card is charged a materially higher CAD amount, the advertised price arguably was not attainable. That is a reading of the provisions, not a decided case on diamond retail, and I am not aware of one.

Where this genuinely does not matter

Two places worth saying out loud, because the currency question can turn into a distraction.

  • Grading is unaffected. The lab does not know or care what currency you paid in. GIA defines cut as how a diamond "interacts with light," describing "the overall design of a diamond, including the arrangement and proportions of the diamond's facets," graded Excellent to Poor for round brilliants. A stone is what the report says it is.
  • Small differences you cannot see. If chasing the best rate pushes you toward a lower cut grade or a clarity grade with a visible inclusion, you have traded something you can see for a few hundred dollars. Spend the FX savings on cut before anything else.

And a genuinely cheaper option that is fine: a well-cut G colour, SI1 stone often looks indistinguishable face-up from a F/VS2 at the same size, while the USD list price gap between those grades is real. That gap, converted, usually dwarfs any exchange-rate spread.

Questions to ask before you pay

  • Is this stone priced to you in USD, and what is the USD figure?
  • What exchange rate did you apply, and on what date?
  • Is the CAD price on my quote firm, or will it be re-converted at settlement?
  • Is there a separate FX or conversion fee, and is it inside this number?
  • Is the quoted number before or after GST/HST?

A jeweller who buys honestly will answer all five without hesitating. Reluctance on the second question is the tell.

What to do next

Ask for the quote in firm CAD, inclusive of any conversion cost, with tax shown separately. Then compare stones on the loose diamond search with that same fixed-CAD standard, so you are comparing prices rather than rate assumptions. Pick the setting once the stone is settled, since the setting cost is far less currency-sensitive than the diamond, and handle metal, size and engraving when you finish the ring. If you want the grading side before you shop, the guides cover cut and colour in more detail.

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