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Round|Lab Grown|IGI

1.55ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG478112353

Shape and cutting style on the report: Round brilliant

Certificate IGI LG478112353

Diamond specifications and retailer prices

From $1,377 AUD
As of November 5, 2026
Save $4,027 AUD (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,404 AUD at MOH London · As of November 5, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG478112353 or 478112353. Listed at 9 retailers as of November 5, 2026, with prices from $1,377 to $5,404, a $4,027 spread on the same certified stone. MOH London lists it at $5,404. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.9°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478112353
Dimensions7.56 × 7.59 × 4.52 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Brown This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.56 mm7.59 mm1.55 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478112353
Side View
Table 60.5%Crown 31.9°Girdle: THN-MEDPavilion 41.5°Culet: NoneDepth 59.6%

Caratlytics Score

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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: Nov 5
Current: $5,404 AUD|Low: $1,377 AUD|High: $5,492 AUD|Avg: $2,896 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4$1,377 AUD
Retailer 5$1,597 AUD
Retailer 2$1,850 AUD
Retailer 7$2,343 AUD
Retailer 6$2,554 AUD
Retailer 3$3,443 AUD
MOH London$5,404 AUD

19 data points across 7 retailers

9 retailers$1,377 AUD to $5,404 AUD

A
Cheapest Retailer
-
$1,377 AUD
A
Retailer 2
-
$1,498 AUD
View
B+
Retailer 3
-
$1,597 AUD
View
Retailer 4
-
$1,597 AUD
View
Price last confirmed 25 days ago
B+
Retailer 5
-
$1,850 AUD
View
B
Retailer 6
-
$2,554 AUD
View
B
Retailer 7
-
$3,443 AUD
View
B
Retailer 8
-
$4,491 AUD
View
Most Expensive
B
MOH London
LG478112353 · Nov 5
$5,404 AUD
£2,979 GBP
View
8 more retailers have this diamond
Prices start from $1,377 AUDSave up to $4,027 AUD

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
$1,377 AUD