CaratHunter
Plans
Marquise|Lab Grown|IGI

1.60ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG839697358

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG839697358

Diamond specifications and retailer prices

From £172 GBP
$229 USD
As of October 28, 2026
Save £1,187 GBP (87%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,359 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.6ct lab-grown marquise diamond

This 1.6ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839697358 or 839697358. Listed at 3 retailers as of October 28, 2026, with prices from £172 to £1,359, a £1,187 spread on the same certified stone. Brilliant Earth lists it at £1,359. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.60
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839697358
Dimensions11.71 × 6.06 × 3.91 mm
L/W Ratio1.93
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.71 mm6.06 mm1.60 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839697358
Side View
Table 62.0%Crown 36.8°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 64.5%

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 28
Current: £1,359 GBP|Low: £172 GBP|High: £1,359 GBP|Avg: £718 GBP
Brilliant Earth
Retailer 2
Retailer 3
October 28, 2026
Retailer 3£172 GBP
Retailer 2£365 GBP
Brilliant Earth£1,359 GBP

24 data points across 3 retailers

3 retailers£172 GBP to £1,359 GBP

A
Cheapest Retailer
-
£172 GBP
$229 USD
Final sale: no returns
A
Retailer 2
-
£365 GBP
View
Most Expensive
B
Brilliant Earth
21613342A · Oct 28
£1,359 GBP
$1,810 USD
View
2 more retailers have this diamond
Prices start from £172 GBPSave up to £1,187 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
1.60ct Marquise
£172 GBP