How much does a 0.20 to 0.49ct D SI1 lab grown emerald diamond cost?

As of October 2026, 0.20 to 0.49ct D SI1 lab grown emerald diamonds typically cost $120 NZD to $574 NZD, with a median price of $240 NZD. There are currently 12 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI1 emerald diamond?

About 60% of these diamonds are available at multiple retailers, with an average price spread of 75%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct D SI1 Lab Grown Emerald

Quick answer

As of October 2026, there are 12 lab grown emerald diamonds with D colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $120 NZD to $574 NZD, with a median of $240 NZD. At least 6 retailers stock this exact specification, and 60% of the stones appear at more than one of them, with an average price spread of 75%. Half of all listings fall between $1,155 NZD and $2,450 NZD per carat. The same specification in natural form lists at a median of about $2,197 NZD per carat.

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. Emerald lab grown stones in the index: 451 USD per carat, -8.3% 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

Lowest Price

$105 NZD

Highest Price

$977 NZD

Average Price

$300 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

60.0%

Price Spread

74.8%

Price Range

Price per carat distribution across retailers

$972/ct

10th Percentile

$515

Median

$972

90th Percentile

$1,705

Score Distribution

26 diamonds scored across 4 quality tiers

Excellent

7 (26.9%)

Very Good

7 (26.9%)

Good

9 (34.6%)

Average

3 (11.5%)

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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