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Oval|Lab Grown|IGI

1.71ct J SI2 Oval Lab Grown Diamond

ID • J/SI2 • IGI LG451058603

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG451058603

Diamond specifications and retailer prices

From £627 GBP
$840 USD
As of October 29, 2026
Save £2,614 GBP (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,241 GBP at MOH London · As of October 27, 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 LG451058603 or 451058603. Listed at 10 retailers as of October 27, 2026, with prices from £627 to £3,241, a £2,614 spread on the same certified stone. MOH London lists it at £3,241. 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
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451058603
Dimensions9.22 × 6.78 × 4.28 mm
L/W Ratio1.36
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.22 mm6.78 mm1.71 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451058603
Side View
Table 59.5%Crown 35.8°Girdle: STK-THKPavilion 41.4°Culet: NoneDepth 63.1%

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: £3,241 GBP|Low: £627 GBP|High: £3,276 GBP|Avg: £1,525 GBP|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 25, 2026
Retailer 4£627 GBP
Retailer 2£869 GBP
Retailer 8£945 GBP
Retailer 9£972 GBP
Retailer 5£1,008 GBP
Retailer 11£1,438 GBP
Retailer 6£1,600 GBP
Retailer 7£1,888 GBP
Retailer 10£1,985 GBP
Retailer 3£2,255 GBP
MOH London£3,241 GBP

14 data points across 11 retailers

10 retailers£627 GBP to £3,241 GBP

A
Cheapest Retailer
-
£627 GBP
$840 USD
B+
Retailer 2
-
£869 GBP
$1,164 USD
View
B+
Retailer 3
-
£945 GBP
$1,266 USD
View
B+
Retailer 4
-
£972 GBP
$1,302 USD
View
Final sale: no returns
Retailer 5
-
£1,008 GBP
$1,350 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
£1,008 GBP
$1,350 USD
View
B
Retailer 7
-
£1,600 GBP
$2,144 USD
View
B
Retailer 8
-
£1,888 GBP
$2,530 USD
View
B
Retailer 9
-
£1,985 GBP
$2,660 USD
View
Most Expensive
B
MOH London
LG451058603 · Oct 27
£3,241 GBP
View
9 more retailers have this diamond
Prices start from £627 GBPSave up to £2,614 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
£627 GBP