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Round|Natural|GIA

0.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2556603477

Certificate GIA 2556603477

Diamond specifications and retailer prices

From $655 SGD
$512 USD
As of November 2, 2026
Save $2,036 SGD (76%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,929 SGD 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 2556603477. Listed at 21 retailers as of October 30, 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556603477
Dimensions5.06 × 5.10 × 3.16 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
5.06 mm5.10 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556603477
Side View
Table 61.0%Crown 34.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 62.3%

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 2
Current: $1,208 SGD|Low: $594 SGD|High: $1,731 SGD|Avg: $1,222 SGD|+3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 7$655 SGD
Retailer 6$1,080 SGD
Retailer 4$1,115 SGD
Retailer 1$1,208 SGD
Retailer 2$1,208 SGD
Retailer 9$1,305 SGD
Retailer 8$1,404 SGD
Retailer 5$1,442 SGD
Retailer 3$1,711 SGD

41 data points across 9 retailers

21 retailers$655 SGD to $2,691 SGD

A
Cheapest Retailer
-
$655 SGD
$512 USD
Final sale: no returns
Retailer 2
-
$831 SGD
$650 USD
View
Price last confirmed 12 days ago
Retailer 3
-
$846 SGD
$662 USD
View
Price last confirmed 17 days ago
Retailer 4
-
$846 SGD
$662 USD
View
Price last confirmed 63 days ago
B+
Retailer 5
-
$867 SGD
$678 USD
View
Retailer 6
-
$878 SGD
$687 USD
View
Price last confirmed 17 days ago
Retailer 7
-
$977 SGD
$764 USD
View
Price last confirmed 41 days ago
B+
Retailer 8
-
$986 SGD
$771 USD
View
B+
Retailer 9
-
$1,038 SGD
$812 USD
View
B
Retailer 10
-
$1,080 SGD
$845 USD
View
B
Retailer 11
-
$1,115 SGD
£687 GBP
View
B
Retailer 12
-
$1,121 SGD
$877 USD
View
B+
Retailer 13
-
$1,186 SGD
$928 USD
View
B+
Retailer 14
-
$1,208 SGD
€900 EUR
View
B+
Retailer 15
-
$1,208 SGD
£744 GBP
View
B
Retailer 16
-
$1,305 SGD
$1,021 USD
View
Retailer 17
-
$1,404 SGD
A$1,690 AUD
View
Price last confirmed 29 days ago
B
Retailer 18
-
$1,442 SGD
ZAR 18,217 ZAR
View
B
Retailer 19
-
$1,711 SGD
£1,054 GBP
View
B
Retailer 20
-
$2,691 SGD
CA$2,923 CAD
View
Most Expensive
NZ Jewellers
9d058924-124d-4d64-be57-fd7bf0c3d098 · Oct 17
$2,929 SGD
$2,291 USD
View
Price under review
20 more retailers have this diamond
Prices start from $655 SGDSave up to $2,036 SGD

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
$655 SGD