Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7551317215

Certificate GIA 7551317215

Diamond specifications and retailer prices

From $387 USD
As of November 6, 2026
Save $1,261 USD (77%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,648 USD at NZ Jewellers · As of November 4, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7551317215. Listed at 15 retailers as of November 4, 2026, with prices from $387 to $1,648, a $1,261 spread on the same certified stone. NZ Jewellers lists it at $1,648. 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
H
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 7551317215
Dimensions5.09 × 5.12 × 3.19 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Feather, Cloud
Top View
5.09 mm5.12 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7551317215
Side View
Table 57.0%Crown 35°Girdle: THN-MEDPavilion 41.4°Culet: NDepth 62.4%

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: Nov 6
Current: $1,648 USD|Low: $387 USD|High: $1,685 USD|Avg: $681 USD|-2.2%
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 2$387 USD
Retailer 3$418 USD
Retailer 4$448 USD
Retailer 7$508 USD
Retailer 15$526 USD
Retailer 5$561 USD
Retailer 12$566 USD
Retailer 6$574 USD
Retailer 11$607 USD
Retailer 9$649 USD
Retailer 13$657 USD
Retailer 8$710 USD
Retailer 10$730 USD
Retailer 14$1,214 USD
NZ Jewellers$1,648 USD

28 data points across 15 retailers

15 retailers$387 USD to $1,648 USD

A
Cheapest Retailer
-
$387 USD
A
Retailer 2
-
$418 USD
View
A
Retailer 3
-
$448 USD
View
Retailer 4
-
$508 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$526 USD
View
Retailer 6
-
$561 USD
View
Price last confirmed 10 days ago
A
Retailer 7
-
$566 USD
View
Retailer 8
-
$574 USD
View
Price last confirmed 8 days ago
A
Retailer 9
-
$607 USD
View
A
Retailer 10
-
$649 USD
View
A
Retailer 11
-
$657 USD
View
B+
Retailer 12
-
$710 USD
View
B+
Retailer 13
-
$730 USD
View
B
Retailer 14
-
$1,214 USD
View
Most Expensive
B
NZ Jewellers
5725664b-4f38-49c7-bb37-be002fbda403 · Nov 4
$1,648 USD
View
14 more retailers have this diamond
Prices start from $387 USDSave up to $1,261 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
$387 USD