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Radiant|Lab Grown|GCAL

3.03ct H SI1 Radiant Lab Grown Diamond

EX • H/SI1 • GCAL 323000128

Shape and cutting style on the report: Radiant brilliant

Certificate GCAL 323000128

Diamond specifications and retailer prices

From £290 GBP
As of November 6, 2026
Save £1,225 GBP (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,514 GBP at Riddles Jewelry · As of November 6, 2026
View at Riddles Jewelry

About this 3.03ct lab-grown radiant diamond

This 3.03ct lab-grown radiant sits in the three to five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GCAL 323000128. Listed at 11 retailers as of November 6, 2026, with prices from £290 to £1,514, a £1,225 spread on the same certified stone. Riddles Jewelry lists it at £1,514. 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

3.03
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle40.5°
Pavilion angle56.8°
OriginLab Grown
Grading LabGCAL
CertificateGCAL 323000128
Dimensions9.86 × 6.99 × 4.88 mm
L/W Ratio1.41
Culet sizeNone
Top View
9.86 mm6.99 mm3.03 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGCAL 323000128
Side View
Table 61.0%Crown 40.5°Girdle: THK-VTKPavilion 56.8°Culet: NoneDepth 69.7%

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 6
Current: £1,050 GBP|Low: £256 GBP|High: £1,514 GBP|Avg: £877 GBP|+7.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Riddles Jewelry
November 6, 2026
Retailer 8£290 GBP
Retailer 4£324 GBP
Retailer 7£359 GBP
Retailer 10£530 GBP
Retailer 6£613 GBP
Retailer 1£1,050 GBP
Retailer 5£1,092 GBP
Retailer 9£1,275 GBP
Retailer 2£1,381 GBP
Retailer 3£1,452 GBP
Riddles Jewelry£1,514 GBP

33 data points across 11 retailers

11 retailers£290 GBP to £1,514 GBP

A
Cheapest Retailer
-
£290 GBP
A
Retailer 2
-
£324 GBP
View
A
Retailer 3
-
£359 GBP
View
B+
Retailer 4
-
£530 GBP
View
A
Retailer 5
-
£613 GBP
View
B+
Retailer 6
-
£1,050 GBP
View
B+
Retailer 7
-
£1,092 GBP
View
B+
Retailer 8
-
£1,275 GBP
View
B+
Retailer 9
-
£1,381 GBP
View
B+
Retailer 10
-
£1,452 GBP
View
Most Expensive
B
Riddles Jewelry
1966654647 · Nov 6
£1,514 GBP
$2,027 USD
View
10 more retailers have this diamond
Prices start from £290 GBPSave up to £1,225 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 Radiant
£290 GBP