Round|Natural|GIA

0.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7556598300

Certificate GIA 7556598300

Diamond specifications and retailer prices

From $490 USD
As of October 29, 2026
Save $1,525 USD (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,197 USD at NZ Jewellers · As of October 17, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7556598300. Listed at 20 retailers as of October 29, 2026, with a 311% 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7556598300
Dimensions5.10 × 5.13 × 3.18 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
5.10 mm5.13 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7556598300
Side View
Table 55.0%Crown 33.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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: Oct 29
Current: $933 USD|Low: $490 USD|High: $1,637 USD|Avg: $964 USD|-4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 8$490 USD
Retailer 5$820 USD
Retailer 4$840 USD
Retailer 3$861 USD
Retailer 2$906 USD
Retailer 1$933 USD
Retailer 9$1,053 USD
Retailer 6$1,081 USD
Retailer 7$1,627 USD

35 data points across 9 retailers

20 retailers$490 USD to $2,015 USD

A
Cheapest Retailer
-
$490 USD
Final sale: no returns
Retailer 2
-
$635 USD
View
Price last confirmed 61 days ago
A
Retailer 3
-
$652 USD
View
Retailer 4
-
$660 USD
View
Price last confirmed 12 days ago
Retailer 5
-
$683 USD
View
Price last confirmed 16 days ago
Retailer 6
-
$683 USD
View
Price last confirmed 17 days ago
Retailer 7
-
$732 USD
View
Price last confirmed 40 days ago
B+
Retailer 8
-
$745 USD
View
B+
Retailer 9
-
$777 USD
View
B
Retailer 10
-
$820 USD
View
B
Retailer 11
-
$861 USD
£678 GBP
View
B
Retailer 12
-
$888 USD
View
B+
Retailer 13
-
$906 USD
£714 GBP
View
B+
Retailer 14
-
$933 USD
€889 EUR
View
B+
Retailer 15
-
$977 USD
View
Retailer 16
-
$1,053 USD
A$1,621 AUD
View
Price last confirmed 27 days ago
B
Retailer 17
-
$1,081 USD
ZAR 17,467 ZAR
View
Retailer 18
-
$1,627 USD
£1,281 GBP
View
Price last confirmed 11 days ago
B
Retailer 19
-
$2,015 USD
CA$2,799 CAD
View
Most Expensive
NZ Jewellers
78702d42-a443-444e-83f8-37bb25aa21a8 · Oct 17
$2,197 USD
View
Price last confirmed 15 days ago
19 more retailers have this diamond
Prices start from $490 USDSave up to $1,525 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
$490 USD