Round|Natural|GIA

0.51ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 1507447220

Certificate GIA 1507447220

Diamond specifications and retailer prices

From $475 USD
As of October 31, 2026
Save $1,538 USD (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,049 USD 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
Color
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: $2,013 USD|Low: $447 USD|High: $2,049 USD|Avg: $912 USD|-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$447 USD
Retailer 12$475 USD
Retailer 3$607 USD
Retailer 10$635 USD
Retailer 7$642 USD
Retailer 2$666 USD
Retailer 14$691 USD
Retailer 15$691 USD
Retailer 6$773 USD
Retailer 9$778 USD
Retailer 5$805 USD
Retailer 8$853 USD
Retailer 11$1,479 USD
Retailer 13$1,860 USD
NZ Jewellers$2,013 USD

36 data points across 15 retailers

20 retailers$475 USD to $2,013 USD

A
Cheapest Retailer
-
$475 USD
A
Retailer 2
-
$607 USD
View
A
Retailer 3
-
$616 USD
View
A
Retailer 4
-
$635 USD
View
A
Retailer 5
-
$642 USD
View
Retailer 6
-
$653 USD
View
Price last confirmed 43 days ago
A
Retailer 7
-
$666 USD
View
Retailer 8
-
$691 USD
View
Price last confirmed 8 days ago
A
Retailer 9
-
$691 USD
View
A
Retailer 10
-
$741 USD
View
Retailer 11
-
$754 USD
View
Price last confirmed 45 days ago
A
Retailer 12
-
$773 USD
View
A
Retailer 13
-
$778 USD
View
A
Retailer 14
-
$805 USD
View
A
Retailer 15
-
$853 USD
View
B
Retailer 16
-
$1,310 USD
View
B
Retailer 17
-
$1,479 USD
View
Retailer 18
-
$1,860 USD
View
Price last confirmed 9 days ago
B
Retailer 19
-
$2,013 USD
View
Most Expensive
NZ Jewellers
5b1bc26a-99ae-42e4-af9d-c455f182f092 · Sep 24
$2,049 USD
View
Price last confirmed 42 days ago
19 more retailers have this diamond
Prices start from $475 USDSave up to $1,538 USD

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
$475 USD