CaratHunter
Plans
Asscher|Lab Grown|IGI

3.09ct G SI1 Asscher Lab Grown Diamond

EX • G/SI1 • IGI LG667411686

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG667411686

Diamond specifications and retailer prices

From £705 GBP
$944 USD
As of November 2, 2026
Save £286 GBP (29%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £991 GBP at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

About this 3.09ct lab-grown asscher diamond

This 3.09ct lab-grown asscher sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG667411686 or 667411686. Listed at 2 retailers as of November 2, 2026, with prices from £705 to £991, a £286 spread on the same certified stone. Diamond Quarter lists it at £991. 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

3.09
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG667411686
Dimensions8.03 × 7.87 × 5.26 mm
L/W Ratio1.02
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.03 mm7.87 mm3.09 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG667411686
Side View
Table 67.0%Crown 37.8°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 66.8%

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 2
Current: £705 GBP|Low: £679 GBP|High: £1,123 GBP|Avg: £842 GBP|-37.3%
September 23, 2026
Retailer 1£705 GBP

4 data points across 1 retailer

2 retailers£705 GBP to £991 GBP

A
Cheapest Retailer
-
£705 GBP
$944 USD
Most Expensive
B
Diamond Quarter
3.09SI1GLG866DEAN · Nov 2
£991 GBP
View
1 more retailer has this diamond
Prices start from £705 GBPSave up to £286 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
3.09ct Asscher
£705 GBP