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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1435831747

Certificate GIA 1435831747

Diamond specifications and retailer prices

From $3,704 SGD
As of November 6, 2026
Save $5,400 SGD (59%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $9,104 SGD at Diamond Quarter · As of November 6, 2026
View at Diamond Quarter

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1435831747. Listed at 28 retailers as of November 6, 2026, with prices from $3,704 to $9,104, a $5,400 spread on the same certified stone. Diamond Quarter lists it at $9,104. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle33°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1435831747
Dimensions6.55 × 6.47 × 3.82 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Key to symbols
Crystal, Feather, Cavity, Needle, Natural
Top View
6.55 mm6.47 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1435831747
Side View
Table 61.0%Crown 33°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 58.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $5,409 SGD|Low: $3,427 SGD|High: $8,590 SGD|Avg: $5,089 SGD|+5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
November 5, 2026
Retailer 5$3,704 SGD
Retailer 6$3,787 SGD
Retailer 20$3,870 SGD
Retailer 11$3,965 SGD
Retailer 16$4,048 SGD
Retailer 13$4,122 SGD
Retailer 7$4,298 SGD
Retailer 3$4,467 SGD
Retailer 8$4,467 SGD
Retailer 4$4,638 SGD
Retailer 21$4,858 SGD
Retailer 19$4,962 SGD
Retailer 17$5,082 SGD
Retailer 10$5,154 SGD
Retailer 23$5,160 SGD
Retailer 24$5,160 SGD
Retailer 14$5,303 SGD
Retailer 2$5,326 SGD
Retailer 1$5,409 SGD
Retailer 15$5,582 SGD
Retailer 18$5,669 SGD
Retailer 12$6,017 SGD
Retailer 22$8,245 SGD
Retailer 9$8,590 SGD

37 data points across 24 retailers

28 retailers$3,704 SGD to $9,104 SGD

A
Cheapest Retailer
-
$3,704 SGD
A
Retailer 2
-
$3,787 SGD
View
A
Retailer 3
-
$3,870 SGD
View
B+
Retailer 4
-
$3,965 SGD
View
B+
Retailer 5
-
$4,048 SGD
View
B+
Retailer 6
-
$4,104 SGD
View
B+
Retailer 7
-
$4,122 SGD
View
Final sale: no returns
B+
Retailer 8
-
$4,298 SGD
View
Retailer 9
-
$4,467 SGD
View
Price last confirmed 15 days ago
Retailer 10
-
$4,467 SGD
View
Price last confirmed 13 days ago
Retailer 11
-
$4,638 SGD
View
Price last confirmed 15 days ago
Retailer 12
-
$4,674 SGD
View
Price last confirmed 25 days ago
B+
Retailer 13
-
$4,858 SGD
View
Retailer 14
-
$4,858 SGD
View
Price last confirmed 8 days ago
B+
Retailer 15
-
$4,962 SGD
View
Retailer 16
-
$5,082 SGD
View
Price last confirmed 29 days ago
Retailer 17
-
$5,154 SGD
View
Price last confirmed 14 days ago
B
Retailer 18
-
$5,160 SGD
View
B
Retailer 19
-
$5,160 SGD
View
B+
Retailer 20
-
$5,303 SGD
View
B+
Retailer 21
-
$5,326 SGD
View
B+
Retailer 22
-
$5,409 SGD
View
Retailer 23
-
$5,582 SGD
View
Price last confirmed 14 days ago
B+
Retailer 24
-
$5,669 SGD
View
B
Retailer 25
-
$6,017 SGD
View
B
Retailer 26
-
$8,245 SGD
View
Retailer 27
-
$8,590 SGD
View
Price last confirmed 14 days ago
Most Expensive
B
Diamond Quarter
1.0SI1D1447F491N · Nov 6
$9,104 SGD
£5,612 GBP
View
27 more retailers have this diamond
Prices start from $3,704 SGDSave up to $5,400 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
$3,704 SGD