How much does a 1.50 to 1.99ct L SI2 natural round diamond cost?

As of November 6, 2026, 1.50 to 1.99ct L SI2 natural round diamonds typically cost $1,921 SGD to $6,426 SGD, with a median price of $3,567 SGD. There are currently 878 diamonds matching this specification available across retailers.

Where can I find the best price on a L SI2 round diamond?

About 61% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct L SI2 Natural Round

Quick answer

As of November 6, 2026, there are 878 natural round diamonds with L colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $1,921 SGD to $6,426 SGD, with a median of $3,567 SGD. Half of all listings fall between $1,717 SGD and $2,968 SGD per carat. The same specification in lab grown form lists at a median of about $1,924 SGD per carat. Over the last 30 days the median price moved +3.5% and the number of listings moved +21.2%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Round natural stones in the index: 2,124 USD per carat, -6.9% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

878

Lowest Price

$885 SGD

Highest Price

$14,473 SGD

Average Price

$3,873 SGD

Market Intelligence

Cross Retailer %

60.9%

Price Spread

53.9%

30-Day Price Trend

+3.5%

30-Day Supply Change

+21.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,819/ct

10th Percentile

$943

Median

$1,819

90th Percentile

$3,208

Score Distribution

878 diamonds scored across 4 quality tiers

Excellent

171 (19.5%)

Very Good

324 (36.9%)

Good

233 (26.5%)

Average

150 (17.1%)

Find Your Diamond

Search 878 L SI2 round diamonds and compare prices.

Search Diamonds

Consider Instead

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

L I1

Save 12%

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