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1.21ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG598387229

Shape and cutting style on the report: Round brilliant

Certificate IGI LG598387229

Diamond specifications and retailer prices

From $822 NZD
As of November 1, 2026
Save $1,869 NZD (69%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,691 NZD at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG598387229 or 598387229. Listed at 9 retailers as of November 1, 2026, with prices from $822 to $2,691, a $1,869 spread on the same certified stone. MOH London lists it at $2,691. 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

1.21
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598387229
Dimensions6.94 × 6.88 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.94 mm6.88 mm1.21 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598387229
Side View
Table 60.0%Crown 32.7°Girdle: MediumPavilion 41.2°Culet: NoneDepth 60.3%

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: Nov 1
Current: $2,691 NZD|Low: $434 NZD|High: $2,729 NZD|Avg: $1,020 NZD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11$521 NZD
Retailer 12$608 NZD
Retailer 3$630 NZD
Retailer 4$664 NZD
Retailer 10$672 NZD
Retailer 8$822 NZD
Retailer 5$952 NZD
Retailer 6$978 NZD
Retailer 9$1,098 NZD
Retailer 2$1,174 NZD
Retailer 7$2,067 NZD
MOH London$2,691 NZD

37 data points across 12 retailers

9 retailers$822 NZD to $2,691 NZD

B+
Cheapest Retailer
-
$822 NZD
B+
Retailer 2
-
$952 NZD
View
B
Retailer 3
-
$978 NZD
View
B+
Retailer 4
-
$1,098 NZD
View
B
Retailer 5
-
$1,174 NZD
View
B
Retailer 6
-
$2,067 NZD
View
Retailer 7
-
$2,163 NZD
View
Price last confirmed 46 days ago
B
Retailer 8
-
$2,247 NZD
View
Most Expensive
B
MOH London
LG598387229 · Nov 5
$2,691 NZD
£1,191 GBP
View
8 more retailers have this diamond
Prices start from $822 NZDSave up to $1,869 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+
1.21ct Round
$822 NZD