CaratHunter
Plans
Marquise|Lab Grown|IGI

3.51ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG715569166

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG715569166

Diamond specifications and retailer prices

From £647 GBP
$868 USD
As of November 1, 2026
Save £1,019 GBP (61%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,666 GBP at Brilliance · As of November 1, 2026
View at Brilliance

About this 3.51ct lab-grown marquise diamond

This 3.51ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG715569166 or 715569166. Listed at 7 retailers as of November 1, 2026, with prices from £647 to £1,666, a £1,019 spread on the same certified stone. Brilliance lists it at £1,666. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.51
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG715569166
Dimensions15.30 × 7.97 × 5.01 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.30 mm7.97 mm3.51 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG715569166
Side View
Table 60.0%Crown 34.9°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.9%

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: £1,666 GBP|Low: £560 GBP|High: £2,988 GBP|Avg: £1,326 GBP
Brilliance
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 8£647 GBP
Retailer 2£676 GBP
Retailer 12£694 GBP
Retailer 6£896 GBP
Retailer 10£921 GBP
Retailer 4£1,221 GBP
Retailer 7£1,350 GBP
Retailer 9£1,453 GBP
Retailer 5£1,514 GBP
Brilliance£1,666 GBP
Retailer 3£1,958 GBP
Retailer 11£2,988 GBP

37 data points across 12 retailers

7 retailers£647 GBP to £1,666 GBP

B+
Cheapest Retailer
-
£647 GBP
$868 USD
A
Retailer 2
-
£676 GBP
View
A
Retailer 3
-
£896 GBP
$1,202 USD
View
Retailer 4
-
£1,221 GBP
HK$12,800 HKD
View
Price last confirmed 33 days ago
B+
Retailer 5
-
£1,350 GBP
$1,811 USD
View
B+
Retailer 6
-
£1,514 GBP
View
Most Expensive
B
Brilliance
D33538590 · Nov 1
£1,666 GBP
$2,236 USD
View
6 more retailers have this diamond
Prices start from £647 GBPSave up to £1,019 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
3.51ct Marquise
£647 GBP