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Oval|Natural|GIA

0.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 2518352958

Certificate GIA 2518352958

Diamond specifications and retailer prices

From $1,152 SGD
$901 USD
As of October 31, 2026
Save $1,373 SGD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,361 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2518352958. Listed at 16 retailers as of October 31, 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle39.02°
Pavilion angle39.28°
OriginNatural
Grading LabGIA
CertificateGIA 2518352958
Dimensions6.56 × 4.41 × 2.72 mm
L/W Ratio1.49
Top View
6.56 mm4.41 mm0.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2518352958
Side View
Table 58.0%Crown 39.02°Girdle: STK-THKPavilion 39.28°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $3,361 SGD|Low: $960 SGD|High: $3,361 SGD|Avg: $1,731 SGD
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
November 1, 2026
Retailer 10$1,152 SGD
Retailer 9$1,222 SGD
Retailer 13$1,237 SGD
Retailer 3$1,249 SGD
Retailer 5$1,249 SGD
Retailer 12$1,296 SGD
Retailer 4$1,441 SGD
Retailer 6$1,626 SGD
Retailer 11$1,802 SGD
Retailer 7$1,933 SGD
Retailer 8$2,127 SGD
Retailer 2$2,525 SGD
NZ Jewellers$3,361 SGD

45 data points across 13 retailers

16 retailers$1,152 SGD to $2,525 SGD

B+
Cheapest Retailer
-
$1,152 SGD
$901 USD
Final sale: no returns
B+
Retailer 2
-
$1,222 SGD
$956 USD
View
B+
Retailer 3
-
$1,226 SGD
$959 USD
View
B+
Retailer 4
-
$1,227 SGD
$960 USD
View
B+
Retailer 5
-
$1,237 SGD
$968 USD
View
B+
Retailer 6
-
$1,249 SGD
$977 USD
View
B+
Retailer 7
-
$1,249 SGD
$977 USD
View
B+
Retailer 8
-
$1,296 SGD
$1,014 USD
View
B+
Retailer 9
-
$1,441 SGD
$1,127 USD
View
B
Retailer 10
-
$1,626 SGD
£1,001 GBP
View
Retailer 11
-
$1,802 SGD
A$2,168 AUD
View
Price last confirmed 28 days ago
B
Retailer 12
-
$1,933 SGD
€1,440 EUR
View
B
Retailer 13
-
$2,127 SGD
ZAR 26,882 ZAR
View
B
Retailer 14
-
$2,234 SGD
CA$2,428 CAD
View
B
Retailer 15
-
$2,525 SGD
£1,555 GBP
View
Most Expensive
NZ Jewellers
07e8e85c-3b95-4719-b79a-7ebc14a03306 · Oct 30
$3,361 SGD
$2,629 USD
View
Price under review
15 more retailers have this diamond
Prices start from $1,152 SGDSave up to $1,373 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.

B+
0.51ct Oval
$1,152 SGD