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Oval|Lab Grown|IGI

1.57ct G SI1 Oval Lab Grown Diamond

ID • G/SI1 • IGI LG778614306

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG778614306

Diamond specifications and retailer prices

From £285 GBP
$382 USD
As of October 30, 2026
Save £655 GBP (70%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £940 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.57ct lab-grown oval diamond

This 1.57ct lab-grown oval sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778614306 or 778614306. Listed at 7 retailers as of October 30, 2026, with prices from £285 to £940, a £655 spread on the same certified stone. Brilliant Earth lists it at £940. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778614306
Dimensions9.30 × 6.47 × 4.00 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.30 mm6.47 mm1.57 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778614306
Side View
Table 61.0%Crown 35.5°Girdle: MED-THKPavilion 39.8°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: Oct 30
Current: £940 GBP|Low: £272 GBP|High: £1,217 GBP|Avg: £563 GBP|-22.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 2£285 GBP
Retailer 5£383 GBP
Retailer 6£388 GBP
Retailer 3£399 GBP
Retailer 7£722 GBP
Retailer 4£856 GBP
Brilliant Earth£940 GBP

39 data points across 7 retailers

7 retailers£285 GBP to £940 GBP

B+
Cheapest Retailer
-
£285 GBP
$382 USD
Retailer 2
-
£383 GBP
€489 EUR
View
Price last confirmed 7 days ago
A
Retailer 3
-
£388 GBP
$520 USD
View
A
Retailer 4
-
£399 GBP
View
B
Retailer 5
-
£722 GBP
$967 USD
View
B
Retailer 6
-
£856 GBP
View
Most Expensive
B
Brilliant Earth
21027109A · Oct 30
£940 GBP
$1,260 USD
View
6 more retailers have this diamond
Prices start from £285 GBPSave up to £655 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 Oval
£285 GBP