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Round|Lab Grown|GIA

15.20ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • GIA 5473896839

Certificate GIA 5473896839

Diamond specifications and retailer prices

From £7,429 GBP
$9,954 USD
As of October 29, 2026
Save £9,774 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £17,203 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 15.2ct lab-grown round diamond

This 15.2ct lab-grown round sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5473896839. Listed at 13 retailers as of October 29, 2026, with prices from £7,429 to £17,203, a £9,774 spread on the same certified stone. Brilliant Earth lists it at £17,203. 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

15.20
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 5473896839
Dimensions16.13 × 16.02 × 9.68 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
16.13 mm16.02 mm15.20 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5473896839
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £17,203 GBP|Low: £6,064 GBP|High: £46,355 GBP|Avg: £13,827 GBP|-3.0%
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
October 30, 2026
Retailer 10£6,064 GBP
Retailer 14£7,429 GBP
Retailer 2£7,663 GBP
Retailer 4£7,726 GBP
Retailer 16£7,816 GBP
Retailer 5£8,565 GBP
Retailer 3£8,914 GBP
Retailer 12£9,199 GBP
Retailer 9£9,202 GBP
Retailer 11£9,434 GBP
Retailer 15£13,051 GBP
Retailer 7£14,970 GBP
Retailer 6£15,489 GBP
Brilliant Earth£17,203 GBP
Retailer 8£34,520 GBP
Retailer 13£46,355 GBP

38 data points across 16 retailers

13 retailers£7,429 GBP to £17,203 GBP

Retailer 1
-
£6,064 GBP
$8,125 USD
Price last confirmed 14 days ago
B+
Retailer 2
-
£7,429 GBP
$9,954 USD
View
B+
Retailer 3
-
£7,663 GBP
View
B
Retailer 4
-
£7,726 GBP
$10,352 USD
View
B
Retailer 5
-
£7,816 GBP
$10,473 USD
View
B+
Retailer 6
-
£8,565 GBP
$11,476 USD
View
Final sale: no returns
B
Retailer 7
-
£8,914 GBP
$11,944 USD
View
B
Retailer 8
-
£9,199 GBP
$12,326 USD
View
B
Retailer 9
-
£9,202 GBP
$12,330 USD
View
B
Retailer 10
-
£9,434 GBP
$12,640 USD
View
B
Retailer 11
-
£13,051 GBP
$17,487 USD
View
Most Expensive
B
Brilliant Earth
15271331Y · Oct 31
£17,203 GBP
$23,050 USD
View
11 more retailers have this diamond
Prices start from £7,429 GBPSave up to £9,774 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.

B+
15.20ct Round
£7,429 GBP