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Round|Lab Grown|IGI

1.55ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG492112480

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492112480

Diamond specifications and retailer prices

From $860 USD
As of October 31, 2026
Save $3,809 USD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,669 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492112480 or 492112480. Listed at 11 retailers as of October 31, 2026, with prices from $860 to $4,669, a $3,809 spread on the same certified stone. MOH London lists it at $4,669. 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

1.55
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492112480
Dimensions7.47 × 7.50 × 4.54 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
7.47 mm7.50 mm1.55 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492112480
Side View
Table 59.0%Crown 33.5°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.6%

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: $4,669 USD|Low: $860 USD|High: $4,731 USD|Avg: $2,204 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2$860 USD
Retailer 3$1,409 USD
Retailer 6$1,578 USD
Retailer 4$1,635 USD
Retailer 7$1,635 USD
Retailer 8$1,805 USD
Retailer 10$2,231 USD
Retailer 5$2,579 USD
Retailer 9$2,967 USD
MOH London$4,669 USD

15 data points across 10 retailers

11 retailers$860 USD to $4,669 USD

A
Cheapest Retailer
-
$860 USD
B+
Retailer 2
-
$1,409 USD
View
B+
Retailer 3
-
$1,533 USD
View
B+
Retailer 4
-
$1,578 USD
View
Final sale: no returns
Retailer 5
-
$1,635 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
$1,635 USD
View
B+
Retailer 7
-
$1,805 USD
View
B
Retailer 8
-
$2,579 USD
View
B
Retailer 9
-
$2,967 USD
View
B
Retailer 10
-
$3,064 USD
View
Most Expensive
B
MOH London
LG492112480 · Nov 1
$4,669 USD
£3,676 GBP
View
10 more retailers have this diamond
Prices start from $860 USDSave up to $3,809 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
1.55ct Round
$860 USD