How much does a 1.50 to 1.99ct E I1 natural round diamond cost?

As of October 2026, 1.50 to 1.99ct E I1 natural round diamonds typically cost $4,169 SGD to $16,910 SGD, with a median price of $9,369 SGD. There are currently 137 diamonds matching this specification available across retailers.

Where can I find the best price on a E I1 round diamond?

About 21% of these diamonds are available at multiple retailers, with an average price spread of 71%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E I1 Natural Round

Quick answer

As of October 2026, there are 137 natural round diamonds with E colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $4,169 SGD to $16,910 SGD, with a median of $9,369 SGD. At least 27 retailers stock this exact specification, and 21% of the stones appear at more than one of them, with an average price spread of 71%. Half of all listings fall between $3,869 SGD and $7,612 SGD per carat. The same specification in lab grown form lists at a median of about $367 SGD per carat. Over the last 30 days the median price moved -6.1% and the number of listings moved +12.6%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

137

Lowest Price

$1,594 SGD

Highest Price

$27,706 SGD

Average Price

$9,944 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

21.4%

Price Spread

70.7%

30-Day Price Trend

-6.1%

30-Day Supply Change

+12.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,131/ct

10th Percentile

$2,241

Median

$4,131

90th Percentile

$7,388

Score Distribution

498 diamonds scored across 4 quality tiers

Excellent

55 (11.0%)

Very Good

116 (23.3%)

Good

56 (11.2%)

Average

271 (54.4%)

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Consider Instead

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

F I1F colour is visually identical to E to the naked eye

Save 18%

Lab-Grown E I1Same specifications, lab-grown origin

Save 93%

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