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1.43ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG499189128

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499189128

Diamond specifications and retailer prices

From $720 USD
As of October 31, 2026
Save $2,976 USD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,696 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.43ct lab-grown round diamond

This 1.43ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499189128 or 499189128. Listed at 11 retailers as of October 29, 2026, with prices from $720 to $3,696, a $2,976 spread on the same certified stone. MOH London lists it at $3,696. 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

1.43
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499189128
Dimensions7.22 × 7.25 × 4.47 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
7.22 mm7.25 mm1.43 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499189128
Side View
Table 54.5%Crown 34.9°GirdlePavilion 40.3°Culet: NoneDepth 61.8%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: $3,696 USD|Low: $720 USD|High: $3,725 USD|Avg: $1,540 USD|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 4$720 USD
Retailer 3$934 USD
Retailer 7$1,046 USD
Retailer 5$1,084 USD
Retailer 8$1,084 USD
Retailer 9$1,260 USD
Retailer 10$1,594 USD
Retailer 6$1,735 USD
Retailer 2$2,411 USD
MOH London$3,696 USD

15 data points across 10 retailers

11 retailers$720 USD to $3,696 USD

A
Cheapest Retailer
-
$720 USD
B+
Retailer 2
-
$934 USD
View
B+
Retailer 3
-
$1,017 USD
View
B+
Retailer 4
-
$1,046 USD
View
Final sale: no returns
Retailer 5
-
$1,084 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$1,084 USD
View
B+
Retailer 7
-
$1,260 USD
View
B
Retailer 8
-
$1,735 USD
View
B
Retailer 9
-
$2,411 USD
View
B
Retailer 10
-
$3,047 USD
View
Most Expensive
B
MOH London
LG499189128 · Oct 29
$3,696 USD
£2,910 GBP
View
10 more retailers have this diamond
Prices start from $720 USDSave up to $2,976 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
1.43ct Round
$720 USD