CaratHunter
Plans
Round|Lab Grown|IGI

3.05ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG815653250

Shape and cutting style on the report: Round brilliant

Certificate IGI LG815653250

Diamond specifications and retailer prices

From £270 GBP
As of November 5, 2026
Save £1,661 GBP (86%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,932 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 3.05ct lab-grown round diamond

This 3.05ct lab-grown round 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 LG815653250 or 815653250. Listed at 20 retailers as of November 5, 2026, with prices from £270 to £1,932, a £1,661 spread on the same certified stone. Brilliant Earth lists it at £1,932. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815653250
Dimensions9.43 × 9.37 × 5.69 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.43 mm9.37 mm3.05 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815653250
Side View
Table 61.0%Crown 32.8°Girdle: THN-MEDPavilion 41.6°Culet: NoneDepth 60.5%

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: Nov 5
Current: £1,932 GBP|Low: £260 GBP|High: £1,932 GBP|Avg: £756 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 5, 2026
Retailer 15£270 GBP
Retailer 8£314 GBP
Retailer 4£335 GBP
Retailer 16£335 GBP
Retailer 10£446 GBP
Retailer 14£452 GBP
Retailer 11£528 GBP
Retailer 7£570 GBP
Retailer 9£597 GBP
Retailer 12£788 GBP
Retailer 6£811 GBP
Retailer 3£1,078 GBP
Retailer 5£1,088 GBP
Retailer 2£1,306 GBP
Retailer 13£1,501 GBP
Brilliant Earth£1,932 GBP

43 data points across 16 retailers

20 retailers£270 GBP to £1,932 GBP

A
Cheapest Retailer
-
£270 GBP
A
Retailer 2
-
£302 GBP
View
Final sale: no returns
A
Retailer 3
-
£314 GBP
View
Retailer 4
-
£335 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£335 GBP
View
A
Retailer 6
-
£380 GBP
View
A
Retailer 7
-
£446 GBP
View
B+
Retailer 8
-
£452 GBP
View
A
Retailer 9
-
£528 GBP
View
A
Retailer 10
-
£570 GBP
View
A
Retailer 11
-
£597 GBP
View
B+
Retailer 12
-
£788 GBP
View
B+
Retailer 13
-
£811 GBP
View
B+
Retailer 14
-
£1,078 GBP
View
B+
Retailer 15
-
£1,088 GBP
View
B+
Retailer 16
-
£1,108 GBP
View
B
Retailer 17
-
£1,276 GBP
View
B
Retailer 18
-
£1,306 GBP
View
Retailer 19
-
£1,501 GBP
View
Price last confirmed 19 days ago
Most Expensive
B
Brilliant Earth
20763709A · Nov 5
£1,932 GBP
$2,600 USD
View
19 more retailers have this diamond
Prices start from £270 GBPSave up to £1,661 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 Round
£270 GBP