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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 $14,171 AUD
$9,954 USD
As of October 29, 2026
Save $18,643 AUD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $32,814 AUD 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 $14,171 to $32,814, a $18,643 spread on the same certified stone. Brilliant Earth lists it at $32,814. 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: $32,814 AUD|Low: $11,567 AUD|High: $88,420 AUD|Avg: $26,375 AUD|-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$11,567 AUD
Retailer 14$14,171 AUD
Retailer 2$14,616 AUD
Retailer 4$14,737 AUD
Retailer 16$14,909 AUD
Retailer 5$16,337 AUD
Retailer 3$17,003 AUD
Retailer 12$17,547 AUD
Retailer 9$17,553 AUD
Retailer 11$17,994 AUD
Retailer 15$24,894 AUD
Retailer 7$28,554 AUD
Retailer 6$29,544 AUD
Brilliant Earth$32,814 AUD
Retailer 8$65,845 AUD
Retailer 13$88,420 AUD

38 data points across 16 retailers

13 retailers$14,171 AUD to $32,814 AUD

Retailer 1
-
$11,567 AUD
$8,125 USD
Price last confirmed 13 days ago
B+
Retailer 2
-
$14,171 AUD
$9,954 USD
View
B+
Retailer 3
-
$14,616 AUD
£8,084 GBP
View
B
Retailer 4
-
$14,737 AUD
$10,352 USD
View
B
Retailer 5
-
$14,909 AUD
$10,473 USD
View
B+
Retailer 6
-
$16,337 AUD
$11,476 USD
View
Final sale: no returns
B
Retailer 7
-
$17,003 AUD
$11,944 USD
View
B
Retailer 8
-
$17,547 AUD
$12,326 USD
View
B
Retailer 9
-
$17,553 AUD
$12,330 USD
View
B
Retailer 10
-
$17,994 AUD
$12,640 USD
View
B
Retailer 11
-
$24,894 AUD
$17,487 USD
View
Most Expensive
B
Brilliant Earth
15271331Y · Oct 31
$32,814 AUD
$23,050 USD
View
11 more retailers have this diamond
Prices start from $14,171 AUDSave up to $18,643 AUD

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
$14,171 AUD