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Round|Natural|GIA

0.51ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 1507447220

Certificate GIA 1507447220

Diamond specifications and retailer prices

From $845 NZD
As of October 31, 2026
Save $2,736 NZD (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $3,645 NZD at NZ Jewellers · As of September 24, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1507447220. Listed at 20 retailers as of October 31, 2026, with a 324% 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

0.51
Carat
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1507447220
Dimensions5.15 × 5.11 × 3.17 mm
L/W Ratio1.01
Star length45%
Lower girdle80%
Key to symbols
Crystal
Top View
5.15 mm5.11 mm0.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1507447220
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $3,581 NZD|Low: $795 NZD|High: $3,645 NZD|Avg: $1,623 NZD|-1.8%
NZ Jewellers
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
November 6, 2026
Retailer 4$795 NZD
Retailer 12$845 NZD
Retailer 3$1,080 NZD
Retailer 10$1,130 NZD
Retailer 7$1,142 NZD
Retailer 2$1,185 NZD
Retailer 14$1,229 NZD
Retailer 15$1,229 NZD
Retailer 6$1,375 NZD
Retailer 9$1,384 NZD
Retailer 5$1,432 NZD
Retailer 8$1,517 NZD
Retailer 11$2,631 NZD
Retailer 13$3,309 NZD
NZ Jewellers$3,581 NZD

36 data points across 15 retailers

20 retailers$845 NZD to $3,581 NZD

A
Cheapest Retailer
-
$845 NZD
A
Retailer 2
-
$1,080 NZD
View
A
Retailer 3
-
$1,096 NZD
View
A
Retailer 4
-
$1,130 NZD
View
A
Retailer 5
-
$1,142 NZD
View
Retailer 6
-
$1,162 NZD
View
Price last confirmed 43 days ago
A
Retailer 7
-
$1,185 NZD
View
Retailer 8
-
$1,229 NZD
View
Price last confirmed 8 days ago
A
Retailer 9
-
$1,229 NZD
View
A
Retailer 10
-
$1,318 NZD
View
Retailer 11
-
$1,341 NZD
View
Price last confirmed 45 days ago
A
Retailer 12
-
$1,375 NZD
View
A
Retailer 13
-
$1,384 NZD
View
A
Retailer 14
-
$1,432 NZD
View
A
Retailer 15
-
$1,517 NZD
View
B
Retailer 16
-
$2,330 NZD
View
B
Retailer 17
-
$2,631 NZD
View
Retailer 18
-
$3,309 NZD
View
Price last confirmed 9 days ago
B
Retailer 19
-
$3,581 NZD
View
Most Expensive
NZ Jewellers
5b1bc26a-99ae-42e4-af9d-c455f182f092 · Sep 24
$3,645 NZD
$2,049 USD
View
Price last confirmed 42 days ago
19 more retailers have this diamond
Prices start from $845 NZDSave up to $2,736 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.

A
0.51ct Round
$845 NZD