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Oval|Lab Grown|IGI

3.05ct G SI1 Oval Lab Grown Diamond

ID • G/SI1 • IGI LG678584132

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG678584132

Diamond specifications and retailer prices

From £454 GBP
As of November 1, 2026
Save £1,212 GBP (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,666 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.05ct lab-grown oval diamond

This 3.05ct lab-grown oval 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 LG678584132 or 678584132. Listed at 15 retailers as of October 31, 2026, with prices from £454 to £1,666, a £1,212 spread on the same certified stone. Brilliant Earth lists it at £1,666. 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

3.05
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678584132
Dimensions11.67 × 8.25 × 5.11 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.67 mm8.25 mm3.05 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678584132
Side View
Table 59.0%Crown 33.7°Girdle: MediumPavilion 41.4°Culet: NoneDepth 61.9%

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 1
Current: £1,666 GBP|Low: £272 GBP|High: £1,666 GBP|Avg: £694 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
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 4£272 GBP
Retailer 3£311 GBP
Retailer 16£315 GBP
Retailer 7£365 GBP
Retailer 8£365 GBP
Retailer 14£448 GBP
Retailer 11£454 GBP
Retailer 12£573 GBP
Retailer 9£608 GBP
Retailer 5£634 GBP
Retailer 15£802 GBP
Retailer 10£846 GBP
Retailer 13£1,084 GBP
Retailer 2£1,318 GBP
Retailer 6£1,408 GBP
Brilliant Earth£1,666 GBP

41 data points across 16 retailers

15 retailers£454 GBP to £1,666 GBP

Retailer 1
-
£272 GBP
Price last confirmed 10 days ago
Retailer 2
-
£315 GBP
View
Price last confirmed 10 days ago
Retailer 3
-
£365 GBP
View
Price last confirmed 12 days ago
Retailer 4
-
£365 GBP
View
Price last confirmed 12 days ago
Retailer 5
-
£448 GBP
View
Price last confirmed 4 days ago
B+
Retailer 6
-
£454 GBP
View
A
Retailer 7
-
£573 GBP
View
A
Retailer 8
-
£608 GBP
View
A
Retailer 9
-
£634 GBP
View
B+
Retailer 10
-
£802 GBP
View
B+
Retailer 11
-
£846 GBP
View
Retailer 12
-
£1,084 GBP
View
Price last confirmed 9 days ago
B+
Retailer 13
-
£1,318 GBP
View
Retailer 14
-
£1,408 GBP
View
Price last confirmed 16 days ago
Most Expensive
B
Brilliant Earth
17470285A · Oct 31
£1,666 GBP
$2,230 USD
View
14 more retailers have this diamond
Prices start from £454 GBPSave up to £1,212 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
3.05ct Oval
£454 GBP