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Carat Hunter · Where to buy diamonds

Where to buy a 1.5ct lab-grown marquise diamond

Every retailer in our index stocking this size and shape, 61 of them, across 146,952 live listings.

Updated September 14, 2026 · Independent. Zero affiliate revenue.

The market at this size and shape

Active listings

146,952

Retailers carrying

61

Median active price

$601

Grade combinations

30

Certificate mix:IGI 144,264 · GCAL 605 · GIA 208 · HRD 11

What it actually costs

Lower 10% $202Median $601Upper 10% $1,714

Middle half sell between $393 to $1,305

Certificated stones with a live price only, 32,994 of them. Each contributes its best available price.

The same stone, priced differently

Typical spread

273%

Typical difference

$1,051

Stones compared

17,214

Across 17,214 stones of this size and shape carried by more than one retailer, the dearest listing sits 273% above the cheapest for the identical certificated diamond, a typical gap of $1,051. 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. 1Adiamor11,892 in stock
    United States·Founded 1999·30-day returns·Ships to United States
    Visit Adiamor
Show 15 more retailers
  11. 21RockHer2,065 in stock
    United States·Founded 2016·40-day returns·Ships to United States
    Visit RockHer

Stock counts are updated daily. Founded, return window and shipping details are retailer-provided and were last verified September 2, 2026.

14 of the 25 retailers ship to United States. 11 do not.

Narrow it down by grade

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

E VVS231,163 · 47rE VS128,220 · 50rD VVS214,613 · 54rF VVS212,697 · 43rD VS110,725 · 46rF VS110,684 · 39rE VS28,289 · 35rD VVS17,260 · 47rD FL5,300 · 30rE VVS14,474 · 46rD IF4,212 · 39rD VS22,056 · 32rG VVS21,906 · 33rF VS21,703 · 31rF VVS11,026 · 40rE IF876 · 37rG VS1736 · 27rE FL327 · 23rG VS2124 · 22rH VS1116 · 16rF IF97 · 23rG VVS175 · 16rH VVS269 · 15rG IF57 · 20rH VS245 · 13rH VVS127 · 4rI VS227 · 5rI VS117 · 9rI VVS215 · 7rF FL11 · 10r

Stones at this spec now

Live 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 60% to 80% less than a comparable natural cohort.

Frequently asked

How much do retailers differ on the same diamond?

Across 17,214 identical stones carried by more than one retailer, the typical gap between the cheapest and dearest listing is 273%, about $1,051.

Can I see retailers for one exact grade?

Yes. Each of the 30 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?

Live listings refresh daily. 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.