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Oval|Lab Grown|IGI

1.51ct K SI1 Oval Lab Grown Diamond

ID • K/SI1 • IGI LG445039057

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG445039057

Diamond specifications and retailer prices

From £685 GBP
As of November 5, 2026
Save £2,003 GBP (75%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,688 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.51ct lab-grown oval diamond

This 1.51ct 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 LG445039057 or 445039057. Listed at 10 retailers as of November 5, 2026, with prices from £685 to £2,688, a £2,003 spread on the same certified stone. MOH London lists it at £2,688. 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

1.51
Carat
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG445039057
Dimensions9.23 × 6.70 × 3.94 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.23 mm6.70 mm1.51 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG445039057
Side View
Table 59.0%Crown 32.9°Girdle: THN-STKPavilion 40.5°Culet: NoneDepth 58.8%

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: £2,688 GBP|Low: £657 GBP|High: £2,731 GBP|Avg: £1,391 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5£685 GBP
Retailer 9£746 GBP
Retailer 6£795 GBP
Retailer 3£926 GBP
Retailer 2£1,104 GBP
Retailer 10£1,174 GBP
Retailer 7£1,273 GBP
Retailer 4£1,768 GBP
Retailer 8£2,234 GBP
MOH London£2,688 GBP

28 data points across 10 retailers

10 retailers£685 GBP to £2,688 GBP

A
Cheapest Retailer
-
£685 GBP
A
Retailer 2
-
£746 GBP
View
Retailer 3
-
£795 GBP
View
Price last confirmed 25 days ago
A
Retailer 4
-
£795 GBP
View
B+
Retailer 5
-
£926 GBP
View
B+
Retailer 6
-
£1,104 GBP
View
B+
Retailer 7
-
£1,273 GBP
View
B
Retailer 8
-
£1,768 GBP
View
B
Retailer 9
-
£2,234 GBP
View
Most Expensive
B
MOH London
LG445039057 · Nov 5
£2,688 GBP
View
9 more retailers have this diamond
Prices start from £685 GBPSave up to £2,003 GBP

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
1.51ct Oval
£685 GBP