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Round|Natural|GIA

1.00ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 6441821726

Certificate GIA 6441821726

Diamond specifications and retailer prices

From $4,164 SGD
As of November 6, 2026
Save $4,621 SGD (53%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,611 SGD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct 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 6441821726. Listed at 22 retailers as of November 2, 2026, with a 111% 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

1.00
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6441821726
Dimensions6.47 × 6.43 × 3.86 mm
L/W Ratio1.01
Star length50%
Top View
6.47 mm6.43 mm1.00 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6441821726
Side View
Table 62.0%Crown 33°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.0%

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 6
Current: $5,847 SGD|Low: $3,988 SGD|High: $8,892 SGD|Avg: $5,608 SGD|+2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2$4,164 SGD
Retailer 8$4,306 SGD
Retailer 7$4,398 SGD
Retailer 9$4,612 SGD
Retailer 3$5,520 SGD
Retailer 6$5,667 SGD
Retailer 1$5,847 SGD
Retailer 10$5,884 SGD
Retailer 4$6,734 SGD
Retailer 5$8,785 SGD

41 data points across 10 retailers

22 retailers$4,164 SGD to $8,785 SGD

B+
Cheapest Retailer
-
$4,164 SGD
B+
Retailer 2
-
$4,306 SGD
View
B+
Retailer 3
-
$4,310 SGD
View
B+
Retailer 4
-
$4,398 SGD
View
B
Retailer 5
-
$4,612 SGD
View
Final sale: no returns
B+
Retailer 6
-
$4,774 SGD
View
B+
Retailer 7
-
$4,988 SGD
View
Retailer 8
-
$4,997 SGD
View
Price last confirmed 22 days ago
Retailer 9
-
$4,997 SGD
View
Price last confirmed 18 days ago
Retailer 10
-
$5,189 SGD
View
Price last confirmed 23 days ago
B+
Retailer 11
-
$5,520 SGD
View
B
Retailer 12
-
$5,639 SGD
View
B
Retailer 13
-
$5,639 SGD
View
B
Retailer 14
-
$5,667 SGD
View
Retailer 15
-
$5,766 SGD
View
Price last confirmed 20 days ago
B
Retailer 16
-
$5,831 SGD
View
B
Retailer 17
-
$5,847 SGD
View
Retailer 18
-
$5,884 SGD
View
Price last confirmed 29 days ago
Retailer 19
-
$6,241 SGD
View
Price last confirmed 15 days ago
B
Retailer 20
-
$6,734 SGD
View
B
Retailer 21
-
$8,785 SGD
View
Most Expensive
NZ Jewellers
eca354b8-503c-4be2-9e95-23624b3afd7e · Oct 20
$9,611 SGD
$7,499 USD
View
Price last confirmed 17 days ago
21 more retailers have this diamond
Prices start from $4,164 SGDSave up to $4,621 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+
1.00ct Round
$4,164 SGD