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Oval|Lab Grown|IGI

1.71ct J SI2 Oval Lab Grown Diamond

ID • J/SI2 • IGI LG451055435

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG451055435

Diamond specifications and retailer prices

From £634 GBP
$850 USD
As of October 29, 2026
Save £2,822 GBP (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,457 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.71ct lab-grown oval diamond

This 1.71ct lab-grown oval sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055435 or 451055435. Listed at 10 retailers as of October 29, 2026, with prices from £634 to £3,457, a £2,822 spread on the same certified stone. MOH London lists it at £3,457. 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

1.71
Carat
J
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.4°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055435
Dimensions9.20 × 6.78 × 4.27 mm
L/W Ratio1.36
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.20 mm6.78 mm1.71 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG451055435
Side View
Table 57.5%Crown 37.4°Girdle: MED-THKPavilion 40.6°Culet: NoneDepth 63.0%

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 29
Current: £3,457 GBP|Low: £634 GBP|High: £3,480 GBP|Avg: £1,701 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 18, 2026
Retailer 5£634 GBP
Retailer 2£1,038 GBP
Retailer 9£1,129 GBP
Retailer 10£1,162 GBP
Retailer 6£1,204 GBP
Retailer 3£1,245 GBP
Retailer 12£1,651 GBP
Retailer 7£1,902 GBP
Retailer 11£2,185 GBP
Retailer 8£2,257 GBP
Retailer 4£2,695 GBP
MOH London£3,457 GBP

13 data points across 12 retailers

10 retailers£634 GBP to £3,457 GBP

A
Cheapest Retailer
-
£634 GBP
$850 USD
A
Retailer 2
-
£1,038 GBP
$1,391 USD
View
B+
Retailer 3
-
£1,129 GBP
$1,513 USD
View
A
Retailer 4
-
£1,162 GBP
$1,557 USD
View
Final sale: no returns
Retailer 5
-
£1,204 GBP
$1,613 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
£1,204 GBP
$1,613 USD
View
B
Retailer 7
-
£1,902 GBP
$2,548 USD
View
B
Retailer 8
-
£2,185 GBP
$2,928 USD
View
B
Retailer 9
-
£2,257 GBP
$3,024 USD
View
Most Expensive
B
MOH London
LG451055435 · Oct 29
£3,457 GBP
View
9 more retailers have this diamond
Prices start from £634 GBPSave up to £2,822 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
1.71ct Oval
£634 GBP