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Round|Lab Grown|GIA

5.09ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • GIA 2488088636

Certificate GIA 2488088636

Diamond specifications and retailer prices

From $2,690 NZD
$1,511 USD
As of October 26, 2026
Save $6,232 NZD (70%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $11,093 NZD at Brilliant Earth · As of October 10, 2026
View at Brilliant Earth

About this 5.09ct lab-grown round diamond

This 5.09ct 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 2488088636. Listed at 17 retailers as of October 26, 2026, with a 232% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

5.09
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 2488088636
Dimensions11.07 × 11.02 × 6.77 mm
L/W Ratio1.00
Star length45%
Top View
11.07 mm11.02 mm5.09 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2488088636
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.2%

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 26
Current: $11,093 NZD|Low: $2,582 NZD|High: $11,093 NZD|Avg: $4,774 NZD
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
Retailer 17
October 29, 2026
Retailer 16$2,690 NZD
Retailer 7$2,927 NZD
Retailer 9$3,011 NZD
Retailer 8$3,119 NZD
Retailer 5$3,427 NZD
Retailer 2$3,578 NZD
Retailer 6$3,639 NZD
Retailer 3$4,058 NZD
Retailer 11$4,152 NZD
Retailer 12$4,313 NZD
Retailer 10$4,715 NZD
Retailer 15$4,918 NZD
Retailer 17$5,021 NZD
Retailer 14$5,555 NZD
Retailer 4$5,849 NZD
Retailer 13$8,923 NZD
Brilliant Earth$11,093 NZD

36 data points across 17 retailers

17 retailers$2,690 NZD to $8,923 NZD

B+
Cheapest Retailer
-
$2,690 NZD
$1,511 USD
B+
Retailer 2
-
$2,927 NZD
$1,644 USD
View
B+
Retailer 3
-
$3,011 NZD
$1,691 USD
View
Final sale: no returns
B+
Retailer 4
-
$3,119 NZD
$1,752 USD
View
B+
Retailer 5
-
$3,427 NZD
$1,925 USD
View
B+
Retailer 6
-
$3,578 NZD
HK$15,700 HKD
View
B+
Retailer 7
-
$3,639 NZD
$2,044 USD
View
B+
Retailer 8
-
$4,058 NZD
$2,279 USD
View
B+
Retailer 9
-
$4,152 NZD
£1,836 GBP
View
B+
Retailer 10
-
$4,313 NZD
£1,907 GBP
View
B+
Retailer 11
-
$4,715 NZD
€2,522 EUR
View
B
Retailer 12
-
$4,918 NZD
$2,762 USD
View
B
Retailer 13
-
$5,021 NZD
$2,820 USD
View
Retailer 14
-
$5,555 NZD
$3,120 USD
View
Price last confirmed 9 days ago
B
Retailer 15
-
$5,849 NZD
$3,285 USD
View
B
Retailer 16
-
$8,923 NZD
£3,946 GBP
View
Most Expensive
Brilliant Earth
14415260A · Oct 10
$11,093 NZD
$6,230 USD
View
Price last confirmed 19 days ago
16 more retailers have this diamond
Prices start from $2,690 NZDSave up to $6,232 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+
5.09ct Round
$2,690 NZD