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Marquise|Lab Grown|IGI

3.10ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG754536918

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754536918

Diamond specifications and retailer prices

From £318 GBP
$427 USD
As of November 1, 2026
Save £1,839 GBP (85%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,627 GBP at Helzberg Diamonds · As of October 8, 2026
View at Helzberg Diamonds

About this 3.1ct lab-grown marquise diamond

This 3.1ct 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 LG754536918 or 754536918. Listed at 6 retailers as of November 1, 2026, with a 578% 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

3.10
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754536918
Dimensions14.42 × 7.69 × 4.91 mm
L/W Ratio1.88
Girdle conditionFaceted
Culet sizePointed
Top View
14.42 mm7.69 mm3.10 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754536918
Side View
Table 64.0%Crown 35.2°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 63.8%

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: £2,627 GBP|Low: £318 GBP|High: £2,627 GBP|Avg: £1,114 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 7£318 GBP
Retailer 10£456 GBP
Retailer 4£554 GBP
Retailer 14£570 GBP
Retailer 11£643 GBP
Retailer 5£709 GBP
Retailer 13£792 GBP
Retailer 6£906 GBP
Retailer 12£1,124 GBP
Retailer 2£1,165 GBP
Retailer 8£1,621 GBP
Retailer 9£2,158 GBP
Retailer 3£2,429 GBP
Helzberg Diamonds£2,627 GBP

20 data points across 14 retailers

6 retailers£318 GBP to £2,158 GBP

A
Cheapest Retailer
-
£318 GBP
$427 USD
Final sale: no returns
B+
Retailer 2
-
£456 GBP
$612 USD
View
B+
Retailer 3
-
£1,165 GBP
$1,563 USD
View
B+
Retailer 4
-
£1,621 GBP
$2,175 USD
View
B
Retailer 5
-
£2,158 GBP
$2,895 USD
View
Most Expensive
Helzberg Diamonds
ZXZNLKLJMPHO · Oct 8
£2,627 GBP
$3,525 USD
View
Price last confirmed 26 days ago
5 more retailers have this diamond
Prices start from £318 GBPSave up to £1,839 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
3.10ct Marquise
£318 GBP