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1.50ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG499189131

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499189131

Diamond specifications and retailer prices

From $830 USD
As of October 31, 2026
Save $3,746 USD (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,576 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct lab-grown round diamond

This 1.5ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499189131 or 499189131. Listed at 10 retailers as of October 31, 2026, with prices from $830 to $4,576, a $3,746 spread on the same certified stone. MOH London lists it at $4,576. 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

1.50
Carat
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499189131
Dimensions7.29 × 7.24 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.29 mm7.24 mm1.50 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499189131
Side View
Table 56.5%Crown 36°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.2%

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: $4,576 USD|Low: $830 USD|High: $4,637 USD|Avg: $2,095 USD
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 1, 2026
Retailer 2$830 USD
Retailer 5$1,228 USD
Retailer 8$1,336 USD
Retailer 10$1,374 USD
Retailer 6$1,424 USD
Retailer 3$1,542 USD
Retailer 11$2,008 USD
Retailer 7$2,257 USD
Retailer 9$2,669 USD
Retailer 12$2,728 USD
Retailer 4$3,188 USD
MOH London$4,576 USD

17 data points across 12 retailers

10 retailers$830 USD to $4,576 USD

A
Cheapest Retailer
-
$830 USD
B+
Retailer 2
-
$1,228 USD
View
B+
Retailer 3
-
$1,336 USD
View
B+
Retailer 4
-
$1,374 USD
View
Final sale: no returns
Retailer 5
-
$1,424 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
$1,424 USD
View
B
Retailer 7
-
$2,257 USD
View
B
Retailer 8
-
$2,669 USD
View
B
Retailer 9
-
$2,728 USD
View
Most Expensive
B
MOH London
LG499189131 · Nov 1
$4,576 USD
£3,603 GBP
View
9 more retailers have this diamond
Prices start from $830 USDSave up to $3,746 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
1.50ct Round
$830 USD