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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 5406598535

Certificate GIA 5406598535

Diamond specifications and retailer prices

From $3,138 SGD
As of October 31, 2026
Save $5,504 SGD (64%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,642 SGD at Diamond Quarter · As of November 5, 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 5406598535. Listed at 21 retailers as of October 31, 2026, with prices from $3,138 to $8,642, a $5,504 spread on the same certified stone. Diamond Quarter lists it at $8,642. 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 angle32.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5406598535
Dimensions6.54 × 6.52 × 3.88 mm
L/W Ratio1.00
Top View
6.54 mm6.52 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5406598535
Side View
Table 58.0%Crown 32.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 59.4%

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: Oct 31
Current: $4,172 SGD|Low: $3,131 SGD|High: $7,632 SGD|Avg: $4,536 SGD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 12$3,138 SGD
Retailer 2$3,188 SGD
Retailer 10$3,934 SGD
Retailer 3$3,966 SGD
Retailer 4$4,023 SGD
Retailer 1$4,172 SGD
Retailer 5$4,427 SGD
Retailer 6$4,483 SGD
Retailer 11$4,577 SGD
Retailer 7$5,321 SGD
Retailer 8$7,270 SGD
Retailer 9$7,632 SGD

29 data points across 12 retailers

21 retailers$3,138 SGD to $8,642 SGD

A
Cheapest Retailer
-
$3,138 SGD
A
Retailer 2
-
$3,188 SGD
View
A
Retailer 3
-
$3,760 SGD
View
A
Retailer 4
-
$3,934 SGD
View
B+
Retailer 5
-
$3,966 SGD
View
B+
Retailer 6
-
$4,023 SGD
View
Final sale: no returns
B+
Retailer 7
-
$4,172 SGD
View
B+
Retailer 8
-
$4,359 SGD
View
Retailer 9
-
$4,359 SGD
View
Price last confirmed 8 days ago
B+
Retailer 10
-
$4,427 SGD
View
B+
Retailer 11
-
$4,483 SGD
View
B+
Retailer 12
-
$4,527 SGD
View
B+
Retailer 13
-
$4,577 SGD
View
Retailer 14
-
$4,674 SGD
View
Price last confirmed 33 days ago
B+
Retailer 15
-
$5,030 SGD
View
B+
Retailer 16
-
$5,321 SGD
View
B
Retailer 17
-
$7,270 SGD
View
B
Retailer 18
-
$7,595 SGD
View
B
Retailer 19
-
$7,632 SGD
View
B
Retailer 20
-
$8,064 SGD
View
Most Expensive
B
Diamond Quarter
1.0SI1D5435FF5FN · Nov 5
$8,642 SGD
£5,328 GBP
View
20 more retailers have this diamond
Prices start from $3,138 SGDSave up to $5,504 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
$3,138 SGD