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Cushion|Lab Grown|IGI

3.03ct D SI1 Cushion Lab Grown Diamond

GD • D/SI1 • IGI LG546215433

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG546215433

Diamond specifications and retailer prices

From £373 GBP
As of November 6, 2026
Save £1,644 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,017 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 3.03ct lab-grown cushion diamond

This 3.03ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG546215433 or 546215433. Listed at 14 retailers as of November 6, 2026, with prices from £373 to £2,017, a £1,644 spread on the same certified stone. Brilliant Earth lists it at £2,017. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.03
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG546215433
Dimensions9.49 × 7.92 × 5.16 mm
L/W Ratio1.20
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
9.49 mm7.92 mm3.03 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG546215433
Side View
Table 62.5%Crown 34.1°Girdle: STK-VTKPavilion 36.9°Culet: NoneDepth 65.2%

Caratlytics Score

How it works →
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 6
Current: £2,017 GBP|Low: £360 GBP|High: £2,017 GBP|Avg: £809 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9£373 GBP
Retailer 11£399 GBP
Retailer 7£508 GBP
Retailer 10£536 GBP
Retailer 4£540 GBP
Retailer 3£623 GBP
Retailer 5£651 GBP
Retailer 2£666 GBP
Retailer 8£977 GBP
Retailer 6£1,461 GBP
Brilliant Earth£2,017 GBP

44 data points across 11 retailers

14 retailers£373 GBP to £2,017 GBP

A
Cheapest Retailer
-
£373 GBP
Final sale: no returns
Retailer 2
-
£399 GBP
View
Price last confirmed 13 days ago
B+
Retailer 3
-
£508 GBP
View
B
Retailer 4
-
£536 GBP
View
A
Retailer 5
-
£540 GBP
View
B+
Retailer 6
-
£623 GBP
View
B+
Retailer 7
-
£651 GBP
View
B+
Retailer 8
-
£666 GBP
View
B+
Retailer 9
-
£977 GBP
View
B
Retailer 10
-
£1,142 GBP
View
B
Retailer 11
-
£1,306 GBP
View
B
Retailer 12
-
£1,461 GBP
View
Retailer 13
-
£1,971 GBP
View
Price last confirmed 95 days ago
Most Expensive
B
Brilliant Earth
11238439A · Nov 6
£2,017 GBP
$2,700 USD
View
13 more retailers have this diamond
Prices start from £373 GBPSave up to £1,644 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
3.03ct Cushion
£373 GBP