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1.55ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG816613920

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816613920

Diamond specifications and retailer prices

From $341 NZD
$192 USD
As of November 1, 2026
Save $1,633 NZD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,974 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816613920 or 816613920. Listed at 15 retailers as of November 1, 2026, with prices from $341 to $1,974, a $1,633 spread on the same certified stone. MOH London lists it at $1,974. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816613920
Dimensions7.46 × 7.40 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.46 mm7.40 mm1.55 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816613920
Side View
Table 55.0%Crown 34.8°Girdle: MediumPavilion 40.6°Culet: NoneDepth 61.6%

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: $1,974 NZD|Low: $341 NZD|High: $1,996 NZD|Avg: $973 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7$341 NZD
Retailer 9$422 NZD
Retailer 4$708 NZD
Retailer 10$736 NZD
Retailer 3$752 NZD
Retailer 2$767 NZD
Retailer 6$1,072 NZD
Retailer 5$1,260 NZD
Retailer 8$1,561 NZD
MOH London$1,974 NZD

44 data points across 10 retailers

15 retailers$341 NZD to $1,974 NZD

A
Cheapest Retailer
-
$341 NZD
$192 USD
A
Retailer 2
-
$396 NZD
$223 USD
View
Retailer 3
-
$422 NZD
$238 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$422 NZD
$238 USD
View
A
Retailer 5
-
$708 NZD
€380 EUR
View
B+
Retailer 6
-
$736 NZD
$415 USD
View
A
Retailer 7
-
$752 NZD
£334 GBP
View
A
Retailer 8
-
$767 NZD
£340 GBP
View
A
Retailer 9
-
$839 NZD
$473 USD
View
B+
Retailer 10
-
$1,072 NZD
$604 USD
View
B+
Retailer 11
-
$1,260 NZD
$710 USD
View
B
Retailer 12
-
$1,357 NZD
$765 USD
View
B+
Retailer 13
-
$1,452 NZD
$818 USD
View
B
Retailer 14
-
$1,561 NZD
$880 USD
View
Most Expensive
B
MOH London
LG816613920 · Nov 1
$1,974 NZD
£876 GBP
View
14 more retailers have this diamond
Prices start from $341 NZDSave up to $1,633 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
1.55ct Round
$341 NZD