Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7553746149

Certificate GIA 7553746149

Diamond specifications and retailer prices

From $673 USD
As of November 4, 2026
Save $801 USD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,528 USD at NZ Jewellers · As of September 23, 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 7553746149. Listed at 18 retailers as of November 4, 2026, with a 119% 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
H
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7553746149
Dimensions5.13 × 5.16 × 3.15 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.13 mm5.16 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7553746149
Side View
Table 58.0%CrownGirdle: Med. - Sli. ThickPavilionCulet: NoneDepth 61.2%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $1,016 USD|Low: $617 USD|High: $2,000 USD|Avg: $1,102 USD|+1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 7$673 USD
Retailer 8$717 USD
Retailer 6$730 USD
Retailer 3$955 USD
Retailer 1$1,016 USD
Retailer 2$1,130 USD
Retailer 4$1,474 USD
Retailer 5$1,993 USD

42 data points across 8 retailers

18 retailers$673 USD to $1,474 USD

A
Cheapest Retailer
-
$673 USD
Final sale: no returns
B+
Retailer 2
-
$717 USD
View
Retailer 3
-
$730 USD
View
Price last confirmed 8 days ago
Retailer 4
-
$730 USD
View
Price last confirmed 29 days ago
Retailer 5
-
$730 USD
View
Price last confirmed 60 days ago
Retailer 6
-
$758 USD
View
Price last confirmed 15 days ago
Retailer 7
-
$758 USD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$836 USD
View
Retailer 9
-
$843 USD
View
Price last confirmed 53 days ago
Retailer 10
-
$843 USD
View
Price last confirmed 44 days ago
Retailer 11
-
$843 USD
View
Price last confirmed 60 days ago
B+
Retailer 12
-
$955 USD
View
B
Retailer 13
-
$1,016 USD
View
B
Retailer 14
-
$1,130 USD
View
B
Retailer 15
-
$1,474 USD
View
Retailer 16
-
$1,993 USD
View
Price last confirmed 9 days ago
Retailer 17
-
$2,528 USD
View
Price under review
Most Expensive
NZ Jewellers
da7f7d1e-7845-44d1-a0cb-83f959df6e4b · Sep 23
$2,528 USD
View
Price under review
17 more retailers have this diamond
Prices start from $673 USDSave up to $801 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
$673 USD