CaratHunter
Plans
Marquise|Lab Grown|IGI

1.71ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG811683879

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG811683879

Diamond specifications and retailer prices

From £324 GBP
$435 USD
As of November 1, 2026
Save £645 GBP (67%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £969 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.71ct lab-grown marquise diamond

This 1.71ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG811683879 or 811683879. Listed at 6 retailers as of October 29, 2026, with prices from £324 to £969, a £645 spread on the same certified stone. MOH London lists it at £969. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.71
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811683879
Dimensions12.59 × 6.05 × 3.91 mm
L/W Ratio2.08
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.59 mm6.05 mm1.71 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811683879
Side View
Table 60.0%Crown 35.7°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 64.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £969 GBP|Low: £324 GBP|High: £976 GBP|Avg: £582 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 3£324 GBP
Retailer 5£451 GBP
Retailer 2£456 GBP
Retailer 4£499 GBP
Retailer 6£812 GBP
MOH London£969 GBP

41 data points across 6 retailers

6 retailers£324 GBP to £969 GBP

B+
Cheapest Retailer
-
£324 GBP
$435 USD
A
Retailer 2
-
£451 GBP
$605 USD
View
A
Retailer 3
-
£456 GBP
View
A
Retailer 4
-
£499 GBP
$669 USD
View
B+
Retailer 5
-
£812 GBP
$1,089 USD
View
Most Expensive
B+
MOH London
LG811683879 · Oct 29
£969 GBP
View
5 more retailers have this diamond
Prices start from £324 GBPSave up to £645 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 Marquise
£324 GBP