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1.57ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG451056289

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056289

Diamond specifications and retailer prices

From £725 GBP
As of November 5, 2026
Save £2,128 GBP (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,853 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.57ct lab-grown round diamond

This 1.57ct 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 LG451056289 or 451056289. Listed at 9 retailers as of November 3, 2026, with prices from £725 to £2,853, a £2,128 spread on the same certified stone. MOH London lists it at £2,853. 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

1.57
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056289
Dimensions7.43 × 7.46 × 4.65 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
Faint Brown
Top View
7.43 mm7.46 mm1.57 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056289
Side View
Table 56.0%Crown 33.5°Girdle: MediumPavilion 41.4°Culet: NoneDepth 62.4%

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: £2,853 GBP|Low: £725 GBP|High: £2,891 GBP|Avg: £1,535 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 3, 2026
Retailer 4£725 GBP
Retailer 5£841 GBP
Retailer 2£970 GBP
Retailer 7£1,232 GBP
Retailer 6£1,346 GBP
Retailer 3£1,813 GBP
MOH London£2,853 GBP

17 data points across 7 retailers

9 retailers£725 GBP to £2,853 GBP

A
Cheapest Retailer
-
£725 GBP
A
Retailer 2
-
£789 GBP
View
Retailer 3
-
£841 GBP
View
Price last confirmed 25 days ago
A
Retailer 4
-
£841 GBP
View
B+
Retailer 5
-
£970 GBP
View
B
Retailer 6
-
£1,346 GBP
View
B
Retailer 7
-
£1,577 GBP
View
B
Retailer 8
-
£1,813 GBP
View
Most Expensive
B
MOH London
LG451056289 · Nov 3
£2,853 GBP
View
8 more retailers have this diamond
Prices start from £725 GBPSave up to £2,128 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
1.57ct Round
£725 GBP