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Marquise|Lab Grown|IGI

3.50ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG800604123

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG800604123

Diamond specifications and retailer prices

From £1,113 GBP
CA$2,075 CAD
As of October 30, 2026
Save £493 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 12, 2026
View at Rare Carat

About this 3.5ct lab-grown marquise diamond

This 3.5ct 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 LG800604123 or 800604123. Listed at 3 retailers as of October 30, 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

3.50
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800604123
Dimensions16.43 × 7.90 × 4.81 mm
L/W Ratio2.08
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.43 mm7.90 mm3.50 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800604123
Side View
Table 62.0%Crown 34.5°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 60.9%

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: Oct 30
Current: £2,115 GBP|Low: £697 GBP|High: £4,397 GBP|Avg: £1,656 GBP|-0.2%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
August 3, 2026
Retailer 5£698 GBP
Retailer 8£721 GBP
Retailer 10£861 GBP
Retailer 3£929 GBP
Retailer 6£1,113 GBP
Retailer 7£1,372 GBP
Retailer 2£1,607 GBP
Rare Carat£2,115 GBP
Retailer 4£2,435 GBP
Retailer 9£4,397 GBP

27 data points across 10 retailers

3 retailers£1,113 GBP to £1,607 GBP

B+
Cheapest Retailer
-
£1,113 GBP
CA$2,075 CAD
B
Retailer 2
-
£1,607 GBP
$2,156 USD
View
Most Expensive
Rare Carat
800604123 · Jul 12
£2,115 GBP
$2,839 USD
View
Price last confirmed 113 days ago
2 more retailers have this diamond
Prices start from £1,113 GBPSave up to £493 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+
3.50ct Marquise
£1,113 GBP