CaratHunter
Plans
Marquise|Lab Grown|IGI

1.89ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG840655923

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840655923

Diamond specifications and retailer prices

From £435 GBP
As of October 27, 2026
Save £720 GBP (62%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,155 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.89ct lab-grown marquise diamond

This 1.89ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG840655923 or 840655923. Listed at 2 retailers as of October 27, 2026, with prices from £435 to £1,155, a £720 spread on the same certified stone. Brilliant Earth lists it at £1,155. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.89
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840655923
Dimensions12.51 × 6.60 × 4.07 mm
L/W Ratio1.90
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.51 mm6.60 mm1.89 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840655923
Side View
Table 60.0%Crown 34.2°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 61.7%

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: Oct 27
Current: £1,155 GBP|Low: £202 GBP|High: £1,215 GBP|Avg: £686 GBP|-4.9%
Brilliant Earth
Retailer 2
Retailer 3
October 27, 2026
Retailer 3£202 GBP
Retailer 2£435 GBP
Brilliant Earth£1,155 GBP

23 data points across 3 retailers

2 retailers£435 GBP to £1,155 GBP

A
Cheapest Retailer
-
£435 GBP
Most Expensive
B
Brilliant Earth
21612598A · Nov 2
£1,155 GBP
$1,550 USD
View
1 more retailer has this diamond
Prices start from £435 GBPSave up to £720 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
1.89ct Marquise
£435 GBP