How much does a 1.00 to 1.49ct G SI1 lab grown heart diamond cost?

As of November 2026, 1.00 to 1.49ct G SI1 lab grown heart diamonds typically cost $335 SGD to $1,824 SGD, with a median price of $956 SGD. There are currently 9 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 heart diamond?

About 38% of these diamonds are available at multiple retailers, with an average price spread of 98%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI1 Lab Grown Heart

Quick answer

As of November 2026, there are 9 lab grown heart diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $335 SGD to $1,824 SGD, with a median of $956 SGD. At least 30 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 98%. Half of all listings fall between $394 SGD and $988 SGD per carat. The same specification in natural form lists at a median of about $3,900 SGD per carat. Over the last 30 days the median price moved -0.2% and the number of listings moved 0.0%.

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. Heart lab grown stones in the index: 421 USD per carat, -1.8% 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: November 2026

Available

Lowest Price

$262 SGD

Highest Price

$2,934 SGD

Average Price

$1,016 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

38.1%

Price Spread

98.2%

30-Day Price Trend

-0.2%

30-Day Supply Change

0.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$473/ct

10th Percentile

$199

Median

$473

90th Percentile

$1,264

Score Distribution

16 diamonds scored across 4 quality tiers

Excellent

3 (18.8%)

Very Good

2 (12.5%)

Good

2 (12.5%)

Average

9 (56.3%)

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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