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Marquise|Lab Grown|IGI

3.51ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG749521296

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG749521296

Diamond specifications and retailer prices

From £1,131 GBP
CA$2,108 CAD
As of November 2, 2026
Save £501 GBP (31%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,115 GBP at Rare Carat · As of July 27, 2026
View at Rare Carat

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 LG749521296 or 749521296. Listed at 3 retailers as of November 1, 2026, with a 44% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG749521296
Dimensions14.83 × 8.03 × 5.14 mm
L/W Ratio1.85
Girdle conditionFaceted
Culet sizePointed
Top View
14.83 mm8.03 mm3.51 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG749521296
Side View
Table 58.0%Crown 35.2°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 64.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £2,115 GBP|Low: £391 GBP|High: £2,687 GBP|Avg: £1,096 GBP|-5.8%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
August 30, 2026
Retailer 7£437 GBP
Retailer 3£498 GBP
Retailer 11£530 GBP
Retailer 5£571 GBP
Retailer 4£613 GBP
Retailer 2£686 GBP
Retailer 10£1,131 GBP
Retailer 6£1,353 GBP
Retailer 8£1,632 GBP
Rare Carat£2,115 GBP
Retailer 9£2,442 GBP

62 data points across 11 retailers

3 retailers£1,131 GBP to £1,632 GBP

B+
Cheapest Retailer
-
£1,131 GBP
CA$2,108 CAD
B+
Retailer 2
-
£1,632 GBP
$2,190 USD
View
Most Expensive
Rare Carat
749521296 · Jul 27
£2,115 GBP
$2,839 USD
View
Price last confirmed 98 days ago
2 more retailers have this diamond
Prices start from £1,131 GBPSave up to £501 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.

B+
3.51ct Marquise
£1,131 GBP