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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 $17,661 NZD
$9,954 USD
As of October 29, 2026
Save $23,236 NZD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $40,898 NZD 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 $17,661 to $40,898, a $23,236 spread on the same certified stone. Brilliant Earth lists it at $40,898. 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: $40,898 NZD|Low: $14,416 NZD|High: $110,202 NZD|Avg: $32,873 NZD|-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$14,416 NZD
Retailer 14$17,661 NZD
Retailer 2$18,217 NZD
Retailer 4$18,368 NZD
Retailer 16$18,582 NZD
Retailer 5$20,362 NZD
Retailer 3$21,192 NZD
Retailer 12$21,870 NZD
Retailer 9$21,877 NZD
Retailer 11$22,427 NZD
Retailer 15$31,027 NZD
Retailer 7$35,588 NZD
Retailer 6$36,822 NZD
Brilliant Earth$40,898 NZD
Retailer 8$82,066 NZD
Retailer 13$110,202 NZD

38 data points across 16 retailers

13 retailers$17,661 NZD to $40,898 NZD

Retailer 1
-
$14,416 NZD
$8,125 USD
Price last confirmed 13 days ago
B+
Retailer 2
-
$17,661 NZD
$9,954 USD
View
B+
Retailer 3
-
$18,217 NZD
£8,084 GBP
View
B
Retailer 4
-
$18,368 NZD
$10,352 USD
View
B
Retailer 5
-
$18,582 NZD
$10,473 USD
View
B+
Retailer 6
-
$20,362 NZD
$11,476 USD
View
Final sale: no returns
B
Retailer 7
-
$21,192 NZD
$11,944 USD
View
B
Retailer 8
-
$21,870 NZD
$12,326 USD
View
B
Retailer 9
-
$21,877 NZD
$12,330 USD
View
B
Retailer 10
-
$22,427 NZD
$12,640 USD
View
B
Retailer 11
-
$31,027 NZD
$17,487 USD
View
Most Expensive
B
Brilliant Earth
15271331Y · Oct 31
$40,898 NZD
$23,050 USD
View
11 more retailers have this diamond
Prices start from $17,661 NZDSave up to $23,236 NZD

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
$17,661 NZD