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Round|Natural|GIA

1.03ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 6455666038

Certificate GIA 6455666038

Diamond specifications and retailer prices

From $4,309 SGD
$3,369 USD
As of November 1, 2026
Save $3,808 SGD (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,455 SGD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.03ct natural round diamond

This 1.03ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6455666038. Listed at 14 retailers as of November 1, 2026, with a 88% 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

1.03
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6455666038
Dimensions6.38 × 6.43 × 4.01 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Crystal, Cloud, Natural
Top View
6.38 mm6.43 mm1.03 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6455666038
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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: Nov 1
Current: $4,669 SGD|Low: $4,105 SGD|High: $8,214 SGD|Avg: $5,369 SGD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$4,309 SGD
Retailer 2$4,470 SGD
Retailer 7$4,479 SGD
Retailer 9$4,642 SGD
Retailer 1$4,669 SGD
Retailer 5$4,999 SGD
Retailer 10$5,198 SGD
Retailer 3$5,655 SGD
Retailer 6$5,965 SGD
Retailer 4$8,116 SGD

41 data points across 10 retailers

14 retailers$4,309 SGD to $8,116 SGD

B+
Cheapest Retailer
-
$4,309 SGD
$3,369 USD
B+
Retailer 2
-
$4,470 SGD
$3,495 USD
View
B+
Retailer 3
-
$4,479 SGD
$3,502 USD
View
Final sale: no returns
B+
Retailer 4
-
$4,642 SGD
$3,630 USD
View
B+
Retailer 5
-
$4,669 SGD
£2,875 GBP
View
Retailer 6
-
$4,852 SGD
$3,794 USD
View
Price last confirmed 32 days ago
B+
Retailer 7
-
$4,999 SGD
£3,078 GBP
View
Retailer 8
-
$5,039 SGD
$3,940 USD
View
Price last confirmed 34 days ago
Retailer 9
-
$5,198 SGD
A$6,253 AUD
View
Price last confirmed 24 days ago
Retailer 10
-
$5,599 SGD
$4,378 USD
View
Price last confirmed 33 days ago
B+
Retailer 11
-
$5,655 SGD
€4,211 EUR
View
B
Retailer 12
-
$5,965 SGD
ZAR 75,348 ZAR
View
B
Retailer 13
-
$8,116 SGD
£4,997 GBP
View
Most Expensive
NZ Jewellers
496021fe-891f-47ba-a52f-36089d12cec4 · Sep 28
$8,455 SGD
$6,611 USD
View
Price last confirmed 35 days ago
13 more retailers have this diamond
Prices start from $4,309 SGDSave up to $3,808 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+
1.03ct Round
$4,309 SGD