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Emerald|Lab Grown|IGI

0.51ct I SI2 Emerald Lab Grown Diamond

VG • I/SI2 • IGI LG407941420

Shape and cutting style on the report: Emerald cut

Certificate IGI LG407941420

Diamond specifications and retailer prices

From $433 NZD
$244 USD
As of October 29, 2026
Save $1,726 NZD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,159 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 0.51ct lab-grown emerald diamond

This 0.51ct lab-grown emerald sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG407941420 or 407941420. Listed at 11 retailers as of October 29, 2026, with prices from $433 to $2,159, a $1,726 spread on the same certified stone. MOH London lists it at $2,159. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle24.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407941420
Dimensions5.32 × 3.87 × 2.51 mm
L/W Ratio1.37
Culet sizeLong
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
5.32 mm3.87 mm0.51 ctI / SI2
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG407941420
Side View
Table 67.5%Crown 24.3°Girdle: Slightly ThickPavilion 41.1°Culet: LNGDepth 64.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $2,159 NZD|Low: $415 NZD|High: $2,174 NZD|Avg: $957 NZD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 8$433 NZD
Retailer 3$483 NZD
Retailer 13$502 NZD
Retailer 9$536 NZD
Retailer 12$536 NZD
Retailer 2$586 NZD
Retailer 10$901 NZD
Retailer 6$1,025 NZD
Retailer 4$1,065 NZD
Retailer 5$1,123 NZD
Retailer 11$1,723 NZD
Retailer 7$1,728 NZD
MOH London$2,159 NZD

24 data points across 13 retailers

11 retailers$433 NZD to $2,159 NZD

B+
Cheapest Retailer
-
$433 NZD
$244 USD
B+
Retailer 2
-
$483 NZD
$272 USD
View
Final sale: no returns
B+
Retailer 3
-
$502 NZD
$283 USD
View
B+
Retailer 4
-
$536 NZD
$302 USD
View
B+
Retailer 5
-
$536 NZD
$302 USD
View
B+
Retailer 6
-
$586 NZD
$330 USD
View
B
Retailer 7
-
$901 NZD
$508 USD
View
B
Retailer 8
-
$1,025 NZD
€550 EUR
View
C
Retailer 9
-
$1,723 NZD
$971 USD
View
C
Retailer 10
-
$1,728 NZD
$974 USD
View
Most Expensive
C
MOH London
LG407941420 · Oct 29
$2,159 NZD
£958 GBP
View
10 more retailers have this diamond
Prices start from $433 NZDSave up to $1,726 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
0.51ct Emerald
$433 NZD