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Round|Lab Grown|IGI

1.20ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG436072235

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436072235

Diamond specifications and retailer prices

From $530 USD
As of October 27, 2026
Save $4,597 USD (90%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,127 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436072235 or 436072235. Listed at 12 retailers as of October 27, 2026, with prices from $530 to $5,127, a $4,597 spread on the same certified stone. MOH London lists it at $5,127. 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

1.20
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072235
Dimensions6.83 × 6.85 × 4.26 mm
L/W Ratio1.00
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
6.83 mm6.85 mm1.20 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436072235
Side View
Table 55.0%Crown 33.7°Girdle: THN-MEDPavilion 41.4°Culet: NoneDepth 62.3%

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: Oct 27
Current: $5,127 USD|Low: $530 USD|High: $5,168 USD|Avg: $2,210 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 5$530 USD
Retailer 4$1,368 USD
Retailer 9$1,532 USD
Retailer 6$1,587 USD
Retailer 8$1,587 USD
Retailer 10$1,760 USD
Retailer 11$2,160 USD
Retailer 7$2,508 USD
Retailer 2$2,711 USD
Retailer 3$2,958 USD
MOH London$5,127 USD

18 data points across 11 retailers

12 retailers$530 USD to $5,127 USD

A
Cheapest Retailer
-
$530 USD
B+
Retailer 2
-
$1,368 USD
View
B+
Retailer 3
-
$1,489 USD
View
B+
Retailer 4
-
$1,532 USD
View
Final sale: no returns
Retailer 5
-
$1,587 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
$1,587 USD
View
B
Retailer 7
-
$1,760 USD
View
B
Retailer 8
-
$2,508 USD
View
B
Retailer 9
-
$2,711 USD
€2,582 EUR
View
B
Retailer 10
-
$2,958 USD
View
B
Retailer 11
-
$2,975 USD
View
Most Expensive
B
MOH London
LG436072235 · Oct 29
$5,127 USD
£4,037 GBP
View
11 more retailers have this diamond
Prices start from $530 USDSave up to $4,597 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
1.20ct Round
$530 USD