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Carat Hunter · Where to buy diamonds

Where to buy a 0.5ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 49 of them, across 26,943 current listings.

Updated October 29, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

26,943

Retailers carrying

49

Median confirmed price

CA$334

Grade combinations

26

Certificate mix:IGI 24,395 · GCAL 122 · GIA 19

What it actually costs

Half of these diamonds are listed between CA$188 and CA$509 (as of October 29, 2026).

Lower 10% CA$171Median CA$334Upper 10% CA$653

Middle half listed between CA$188 to CA$509

Certificated stones with a recently confirmed price only, 2,492 of them. Each contributes its cheapest confirmed price.

The same stone, priced differently

Typical spread

423%

Typical difference

CA$996

Stones compared

1,790

Across 1,790 stones of this size and shape carried by more than one retailer, the dearest listing sits 423% above the cheapest for the identical certificated diamond, a typical gap of CA$996. That gap is what comparing before you buy avoids.

Every retailer that stocks this spec

Ranked by active inventory count. Selection is mechanical, not editorial.

  1. 1Rare Carat1,965 in stock
    United States·Founded 2016·30-day returns·Ships to Canada
    Terms read on the retailer’s own site, October 19, 2026
    Visit Rare Carat
  2. 2Aurelinne1,841 in stock
    United States·Founded 2021·30-day returns·Ships to Canada
    Terms not yet verified
    Visit Aurelinne
  5. 5NZ Jewellers1,617 in stock
    New Zealand·Founded 2006·30-day returns·Ships to Canada
    Terms read on the retailer’s own site, October 19, 2026
    Visit NZ Jewellers
  6. 6

    The Perfect Carat

    1,348 in stock
    US
    Terms not yet verified
Show 15 more retailers
  3. 13B2C Jewels805 in stock
    United States·Founded 2004·30-day returns·Ships to Canada
    Terms read on the retailer’s own site, October 19, 2026
    Visit B2C Jewels
  4. 14Allurez732 in stock
    United States·Founded 2010·30-day returns·Ships to Canada
    Terms not yet verified
    Visit Allurez
  7. 17Yorxs673 in stock
    Germany·Founded 2011·100-day returns
    Terms not yet verified
    Visit Yorxs

Stock counts are updated daily. Founded and shipping details come from public sources. Return terms are our summary of each retailer's own policy page, dated per retailer above. Retailers change their terms, so check the retailer's own returns and shipping pages before you buy.

16 of the 25 retailers ship to Canada. 9 do not.

Narrow it down by grade

Each combination below has its own page with the retailers that stock exactly that grade.

D VVS17,910 · 43rD VVS25,119 · 43rD VS12,248 · 43rE VVS21,586 · 39rE VVS11,543 · 41rD IF1,518 · 39rE VS11,465 · 44rG VS1604 · 28rF VS1555 · 29rF VVS2541 · 34rF VS2495 · 26rD VS2440 · 37rH VS1419 · 24rD FL412 · 30rH VS2383 · 20rE VS2315 · 28rE IF299 · 36rG VVS2278 · 26rG VS2267 · 21rH VVS2170 · 26rF VVS1150 · 34rE FL88 · 24rI VS165 · 14rI VS234 · 16rI VVS219 · 12rF IF13 · 13r

Stones at this spec now

Current examples carried by more than one retailer, so the comparison is real. Prices shown in USD.

What this spec means

  • Marquise: a pointed-end ellipse that faces up large for its carat.
  • Lab-grown: chemically identical to natural diamonds, typically at least 90% less than a comparable natural cohort from 1 carat up.

Frequently asked

How much do retailers differ on the same diamond?

Across 1,790 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 423%, about CA$996.

Can I see retailers for one exact grade?

Yes. Each of the 26 color and clarity combinations above has its own page listing the retailers that stock exactly that grade.

Does Carat Hunter earn commission from these retailers?

No. We earn zero affiliate revenue from any retailer in our index.

How fresh is this data?

Listings refresh as we re-read each retailer, most of them every day. Static facts about each retailer refresh weekly.

How is the retailer ranking calculated?

Strictly by active inventory count for this exact spec. The retailer carrying the most stones at the spec ranks first. There is no editorial input, weighting or affiliate consideration.

Why do you not show per-retailer prices on this page?

Prices vary per stone, not per store. Click through to any matched diamond and you will see every retailer's price on the exact same physical stone, which is the meaningful comparison.