How much does a 1.00 to 1.49ct E IF lab grown marquise diamond cost?

As of October 2026, 1.00 to 1.49ct E IF lab grown marquise diamonds typically cost £172 GBP to £1,571 GBP, with a median price of £446 GBP. There are currently 210 diamonds matching this specification available across retailers.

Where can I find the best price on a E IF marquise diamond?

About 38% of these diamonds are available at multiple retailers, with an average price spread of 114%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct E IF Lab Grown Marquise

Quick answer

As of October 2026, there are 210 lab grown marquise diamonds with E colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £172 GBP to £1,571 GBP, with a median of £446 GBP. At least 54 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 114%. Half of all listings fall between £317 GBP and £848 GBP per carat. The same specification in natural form lists at a median of about £7,071 GBP per carat. Over the last 30 days the median price moved -17.5% and the number of listings moved +18.8%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise lab grown stones in the index: 485 USD per carat, -3.2% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

210

Lowest Price

£140 GBP

Highest Price

£4,004 GBP

Average Price

£647 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

37.7%

Price Spread

114.0%

30-Day Price Trend

-17.5%

30-Day Supply Change

+18.8%

Volatility (30d)

0.09

Price Range

Price per carat distribution across retailers

$624/ct

10th Percentile

$271

Median

$624

90th Percentile

$1,480

Score Distribution

680 diamonds scored across 5 quality tiers

Exceptional

10 (1.5%)

Excellent

219 (32.2%)

Very Good

145 (21.3%)

Good

127 (18.7%)

Average

179 (26.3%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

F IFF colour is visually identical to E to the naked eye

Save 5%

E VVS1VVS1 inclusions are not visible without magnification

Save 18%

Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1