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1.51ct J I1 Round Lab Grown Diamond

EX • J/I1 • IGI LG788685687

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788685687

Diamond specifications and retailer prices

From $275 NZD
$155 USD
As of November 1, 2026
Save $1,537 NZD (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,812 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI LG788685687 or 788685687. Listed at 11 retailers as of November 1, 2026, with prices from $275 to $1,812, a $1,537 spread on the same certified stone. MOH London lists it at $1,812. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
J
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788685687
Dimensions7.39 × 7.43 × 4.45 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.39 mm7.43 mm1.51 ctJ / I1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788685687
Side View
Table 62.0%Crown 34.4°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,812 NZD|Low: $266 NZD|High: $1,954 NZD|Avg: $697 NZD|-7.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 4$275 NZD
Retailer 9$312 NZD
Retailer 8$362 NZD
Retailer 10$387 NZD
Retailer 6$389 NZD
Retailer 2$493 NZD
Retailer 5$658 NZD
Retailer 3$848 NZD
Retailer 11$972 NZD
Retailer 7$1,246 NZD
MOH London$1,812 NZD

27 data points across 11 retailers

11 retailers$275 NZD to $1,812 NZD

A
Cheapest Retailer
-
$275 NZD
$155 USD
A
Retailer 2
-
$312 NZD
$176 USD
View
A
Retailer 3
-
$362 NZD
$204 USD
View
Retailer 4
-
$387 NZD
$218 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$389 NZD
$219 USD
View
B+
Retailer 6
-
$493 NZD
$278 USD
View
B+
Retailer 7
-
$658 NZD
€353 EUR
View
B+
Retailer 8
-
$848 NZD
$478 USD
View
B+
Retailer 9
-
$972 NZD
$548 USD
View
B+
Retailer 10
-
$1,246 NZD
$702 USD
View
Most Expensive
B
MOH London
LG788685687 · Nov 1
$1,812 NZD
£804 GBP
View
10 more retailers have this diamond
Prices start from $275 NZDSave up to $1,537 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.

A
1.51ct Round
$275 NZD