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Oval|Lab Grown|IGI

1.56ct K SI1 Oval Lab Grown Diamond

ID • K/SI1 • IGI LG451057940

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG451057940

Diamond specifications and retailer prices

From $1,377 AUD
As of November 5, 2026
Save $4,026 AUD (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,403 AUD at MOH London · As of November 5, 2026
View at MOH London

About this 1.56ct lab-grown oval diamond

This 1.56ct lab-grown oval 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 LG451057940 or 451057940. Listed at 9 retailers as of November 5, 2026, with prices from $1,377 to $5,403, a $4,026 spread on the same certified stone. MOH London lists it at $5,403. 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

1.56
Carat
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057940
Dimensions9.17 × 6.63 × 4.10 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.17 mm6.63 mm1.56 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057940
Side View
Table 59.0%Crown 34.1°Girdle: MED-STKPavilion 41.2°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: Nov 5
Current: $5,403 AUD|Low: $1,322 AUD|High: $5,484 AUD|Avg: $2,924 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 4$1,377 AUD
Retailer 8$1,499 AUD
Retailer 5$1,598 AUD
Retailer 2$1,856 AUD
Retailer 9$2,352 AUD
Retailer 6$2,557 AUD
Retailer 3$3,443 AUD
Retailer 7$4,491 AUD
Retailer 10$4,574 AUD
MOH London$5,403 AUD

16 data points across 10 retailers

9 retailers$1,377 AUD to $5,403 AUD

A
Cheapest Retailer
-
$1,377 AUD
A
Retailer 2
-
$1,499 AUD
View
Retailer 3
-
$1,598 AUD
View
Price last confirmed 25 days ago
A
Retailer 4
-
$1,598 AUD
View
A
Retailer 5
-
$1,856 AUD
View
B+
Retailer 6
-
$2,557 AUD
View
B
Retailer 7
-
$3,443 AUD
View
B
Retailer 8
-
$4,491 AUD
View
Most Expensive
B
MOH London
LG451057940 · Nov 5
$5,403 AUD
£2,923 GBP
View
8 more retailers have this diamond
Prices start from $1,377 AUDSave up to $4,026 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
1.56ct Oval
$1,377 AUD