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Round|Natural|GIA

1.00ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6521858903

Certificate GIA 6521858903

Diamond specifications and retailer prices

From $3,057 SGD
As of November 6, 2026
Save $3,567 SGD (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $6,920 SGD at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6521858903. Listed at 21 retailers as of November 4, 2026, with a 117% 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6521858903
Dimensions6.46 × 6.42 × 3.88 mm
L/W Ratio1.01
Top View
6.46 mm6.42 mm1.00 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6521858903
Side View
Table 61.0%Crown 34°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.2%

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 6
Current: $4,248 SGD|Low: $3,057 SGD|High: $6,724 SGD|Avg: $4,474 SGD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8$3,057 SGD
Retailer 5$3,180 SGD
Retailer 10$3,631 SGD
Retailer 2$3,666 SGD
Retailer 6$3,831 SGD
Retailer 3$4,085 SGD
Retailer 1$4,248 SGD
Retailer 4$4,614 SGD
Retailer 7$6,624 SGD
Retailer 9$6,699 SGD

36 data points across 10 retailers

21 retailers$3,057 SGD to $6,624 SGD

A
Cheapest Retailer
-
$3,057 SGD
A
Retailer 2
-
$3,180 SGD
View
A
Retailer 3
-
$3,631 SGD
View
A
Retailer 4
-
$3,666 SGD
View
Final sale: no returns
A
Retailer 5
-
$3,750 SGD
View
A
Retailer 6
-
$3,831 SGD
View
Retailer 7
-
$3,972 SGD
View
Price last confirmed 44 days ago
Retailer 8
-
$3,972 SGD
View
Price last confirmed 25 days ago
Retailer 9
-
$3,972 SGD
View
Price last confirmed 28 days ago
B+
Retailer 10
-
$4,023 SGD
View
B+
Retailer 11
-
$4,085 SGD
View
Retailer 12
-
$4,126 SGD
View
Price last confirmed 38 days ago
B+
Retailer 13
-
$4,155 SGD
View
B+
Retailer 14
-
$4,248 SGD
View
Retailer 15
-
$4,583 SGD
View
Price last confirmed 45 days ago
Retailer 16
-
$4,583 SGD
View
Price last confirmed 28 days ago
B+
Retailer 17
-
$4,614 SGD
View
B
Retailer 18
-
$6,624 SGD
View
Retailer 19
-
$6,699 SGD
View
Price last confirmed 9 days ago
Retailer 20
-
$6,920 SGD
View
Price last confirmed 46 days ago
Most Expensive
NZ Jewellers
648891c1-c419-4a43-b1f7-bc6f347ebb64 · Sep 26
$6,920 SGD
$5,418 USD
View
Price last confirmed 40 days ago
20 more retailers have this diamond
Prices start from $3,057 SGDSave up to $3,567 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
1.00ct Round
$3,057 SGD