Marquise|Lab Grown|IGI

3.06ct D SI1 Marquise Lab Grown Diamond

ID • D/SI1 • IGI LG842630605

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG842630605

Diamond specifications and retailer prices

From £338 GBP
As of November 4, 2026
Save £1,869 GBP (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,207 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 3.06ct lab-grown marquise diamond

This 3.06ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG842630605 or 842630605. Listed at 13 retailers as of November 4, 2026, with prices from £338 to £2,207, a £1,869 spread on the same certified stone. Brilliant Earth lists it at £2,207. 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

3.06
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842630605
Dimensions14.76 × 7.55 × 4.92 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.76 mm7.55 mm3.06 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842630605
Side View
Table 57.0%Crown 35.6°Girdle: MED-STKPavilion 41.9°Culet: NoneDepth 65.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,207 GBP|Low: £338 GBP|High: £2,207 GBP|Avg: £967 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
Retailer 13
November 6, 2026
Retailer 3£338 GBP
Retailer 11£409 GBP
Retailer 9£483 GBP
Retailer 2£508 GBP
Retailer 10£572 GBP
Retailer 4£592 GBP
Retailer 6£610 GBP
Retailer 8£909 GBP
Retailer 13£1,161 GBP
Retailer 5£1,192 GBP
Retailer 7£1,460 GBP
Retailer 12£1,984 GBP
Brilliant Earth£2,207 GBP

20 data points across 13 retailers

13 retailers£338 GBP to £2,207 GBP

A
Cheapest Retailer
-
£338 GBP
Final sale: no returns
A
Retailer 2
-
£409 GBP
View
A
Retailer 3
-
£483 GBP
View
A
Retailer 4
-
£508 GBP
View
Retailer 5
-
£572 GBP
View
Price last confirmed 10 days ago
B+
Retailer 6
-
£592 GBP
View
A
Retailer 7
-
£610 GBP
View
B+
Retailer 8
-
£909 GBP
View
Retailer 9
-
£1,161 GBP
View
Price last confirmed 11 days ago
B+
Retailer 10
-
£1,192 GBP
View
B
Retailer 11
-
£1,460 GBP
View
Retailer 12
-
£1,984 GBP
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
21831554A · Nov 4
£2,207 GBP
$2,970 USD
View
12 more retailers have this diamond
Prices start from £338 GBPSave up to £1,869 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
3.06ct Marquise
£338 GBP