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Marquise|Lab Grown|IGI

3.89ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG807698439

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG807698439

Diamond specifications and retailer prices

From £414 GBP
$555 USD
As of November 1, 2026
Save £2,294 GBP (85%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,802 GBP at Brilliant Earth · As of September 28, 2026
View at Brilliant Earth

About this 3.89ct lab-grown marquise diamond

This 3.89ct 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 LG807698439 or 807698439. Listed at 6 retailers as of November 1, 2026, with a 555% 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

3.89
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG807698439
Dimensions16.97 × 8.16 × 5.01 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
16.97 mm8.16 mm3.89 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG807698439
Side View
Table 62.0%Crown 35.1°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.4%

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: £2,802 GBP|Low: £414 GBP|High: £2,802 GBP|Avg: £1,297 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 27, 2026
Retailer 6£414 GBP
Retailer 5£577 GBP
Retailer 10£641 GBP
Retailer 9£703 GBP
Retailer 3£800 GBP
Retailer 4£981 GBP
Retailer 11£1,064 GBP
Retailer 12£1,269 GBP
Retailer 8£1,502 GBP
Retailer 7£2,053 GBP
Retailer 2£2,707 GBP
Brilliant Earth£2,802 GBP

16 data points across 12 retailers

6 retailers£414 GBP to £2,707 GBP

A
Cheapest Retailer
-
£414 GBP
$555 USD
Final sale: no returns
B+
Retailer 2
-
£577 GBP
$774 USD
View
B+
Retailer 3
-
£1,502 GBP
$2,016 USD
View
Retailer 4
-
£2,053 GBP
$2,755 USD
View
Price last confirmed 8 days ago
B
Retailer 5
-
£2,707 GBP
$3,633 USD
View
Most Expensive
Brilliant Earth
20438618A · Sep 28
£2,802 GBP
$3,760 USD
View
Price last confirmed 34 days ago
5 more retailers have this diamond
Prices start from £414 GBPSave up to £2,294 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
3.89ct Marquise
£414 GBP