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Round|Lab Grown|IGI

1.71ct J VS1 Round Lab Grown Diamond

ID • J/VS1 • IGI LG496121328

Shape and cutting style on the report: Round brilliant

Certificate IGI LG496121328

Diamond specifications and retailer prices

From £709 GBP
$950 USD
As of October 30, 2026
Save £3,004 GBP (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,713 GBP at MOH London · As of October 27, 2026
View at MOH London

About this 1.71ct lab-grown round diamond

This 1.71ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG496121328 or 496121328. Listed at 12 retailers as of October 27, 2026, with prices from £709 to £3,713, a £3,004 spread on the same certified stone. MOH London lists it at £3,713. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.71
Carat
J
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG496121328
Dimensions7.61 × 7.63 × 4.76 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.61 mm7.63 mm1.71 ctJ / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG496121328
Side View
Table 58.0%Crown 35.8°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.4%

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: £3,713 GBP|Low: £709 GBP|High: £3,752 GBP|Avg: £1,985 GBP|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2£709 GBP
Retailer 6£1,218 GBP
Retailer 7£1,253 GBP
Retailer 8£1,425 GBP
Retailer 9£1,763 GBP
Retailer 5£2,046 GBP
Retailer 4£2,296 GBP
Retailer 3£2,387 GBP
Retailer 10£2,905 GBP
MOH London£3,713 GBP

18 data points across 10 retailers

12 retailers£709 GBP to £3,713 GBP

A
Cheapest Retailer
-
£709 GBP
$950 USD
A
Retailer 2
-
£1,119 GBP
$1,500 USD
View
B+
Retailer 3
-
£1,218 GBP
$1,632 USD
View
B+
Retailer 4
-
£1,253 GBP
$1,679 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,299 GBP
$1,740 USD
View
Retailer 6
-
£1,299 GBP
$1,740 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
£1,425 GBP
$1,910 USD
View
B
Retailer 8
-
£2,046 GBP
$2,742 USD
View
B
Retailer 9
-
£2,296 GBP
$3,076 USD
View
B
Retailer 10
-
£2,387 GBP
ZAR 51,664 ZAR
View
B
Retailer 11
-
£2,434 GBP
$3,261 USD
View
Most Expensive
B
MOH London
LG496121328 · Oct 27
£3,713 GBP
View
11 more retailers have this diamond
Prices start from £709 GBPSave up to £3,004 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 Round
£709 GBP