Round|Lab Grown|IGI

1.23ct H VS1 Round Lab Grown Diamond

ID • H/VS1 • IGI LG818686333

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686333

Diamond specifications and retailer prices

From $204 USD
As of November 1, 2026
Save $981 USD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,185 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG818686333 or 818686333. Listed at 16 retailers as of November 1, 2026, with prices from $204 to $1,185, a $981 spread on the same certified stone. MOH London lists it at $1,185. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
H
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686333
Dimensions6.93 × 6.91 × 4.21 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.93 mm6.91 mm1.23 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686333
Side View
Table 56.0%Crown 33.3°Girdle: MediumPavilion 40.9°Culet: NoneDepth 60.9%

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: $1,185 USD|Low: $204 USD|High: $1,199 USD|Avg: $601 USD|-1.1%
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
November 1, 2026
Retailer 9$204 USD
Retailer 12$253 USD
Retailer 4$424 USD
Retailer 2$438 USD
Retailer 13$439 USD
Retailer 6$462 USD
Retailer 11$525 USD
Retailer 10$610 USD
Retailer 7$619 USD
Retailer 8$654 USD
Retailer 5$868 USD
Retailer 3$915 USD
MOH London$1,185 USD

26 data points across 13 retailers

16 retailers$204 USD to $1,185 USD

A
Cheapest Retailer
-
$204 USD
A
Retailer 2
-
$237 USD
View
Retailer 3
-
$253 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$253 USD
View
A
Retailer 5
-
$424 USD
View
A
Retailer 6
-
$438 USD
ZAR 7,070 ZAR
View
A
Retailer 7
-
$439 USD
View
B+
Retailer 8
-
$462 USD
€440 EUR
View
B+
Retailer 9
-
$525 USD
View
B+
Retailer 10
-
$610 USD
View
B+
Retailer 11
-
$619 USD
A$953 AUD
View
B+
Retailer 12
-
$654 USD
View
B
Retailer 13
-
$815 USD
View
B
Retailer 14
-
$868 USD
View
B
Retailer 15
-
$934 USD
View
Most Expensive
B
MOH London
LG818686333 · Nov 1
$1,185 USD
£933 GBP
View
15 more retailers have this diamond
Prices start from $204 USDSave up to $981 USD

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
1.23ct Round
$204 USD