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Round|Lab Grown|IGI

1.55ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG485161772

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485161772

Diamond specifications and retailer prices

From $860 USD
As of October 30, 2026
Save $3,871 USD (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,731 USD at MOH London · As of October 25, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485161772 or 485161772. Listed at 10 retailers as of October 25, 2026, with prices from $860 to $4,731, a $3,871 spread on the same certified stone. MOH London lists it at $4,731. 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
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485161772
Dimensions7.40 × 7.37 × 4.55 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
7.40 mm7.37 mm1.55 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485161772
Side View
Table 59.5%Crown 36.2°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 61.6%

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 30
Current: $4,731 USD|Low: $860 USD|High: $4,788 USD|Avg: $2,149 USD|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2$860 USD
Retailer 5$1,268 USD
Retailer 8$1,379 USD
Retailer 10$1,420 USD
Retailer 6$1,471 USD
Retailer 3$1,723 USD
Retailer 12$2,036 USD
Retailer 7$2,328 USD
Retailer 11$2,741 USD
Retailer 9$2,756 USD
Retailer 4$3,292 USD
MOH London$4,731 USD

14 data points across 12 retailers

10 retailers$860 USD to $4,731 USD

A
Cheapest Retailer
-
$860 USD
B+
Retailer 2
-
$1,268 USD
View
B+
Retailer 3
-
$1,379 USD
View
B+
Retailer 4
-
$1,420 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,471 USD
View
Retailer 6
-
$1,471 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
$2,328 USD
View
B
Retailer 8
-
$2,741 USD
View
B
Retailer 9
-
$2,756 USD
View
Most Expensive
B
MOH London
LG485161772 · Oct 25
$4,731 USD
£3,725 GBP
View
9 more retailers have this diamond
Prices start from $860 USDSave up to $3,871 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