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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2557652255

Certificate GIA 2557652255

Diamond specifications and retailer prices

From $3,826 SGD
As of November 6, 2026
Save $5,068 SGD (57%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $9,266 SGD at NZ Jewellers · As of October 3, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557652255. Listed at 24 retailers as of November 2, 2026, with a 132% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557652255
Dimensions6.36 × 6.42 × 4.01 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
6.36 mm6.42 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557652255
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.7%

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: $3,826 SGD|Low: $3,826 SGD|High: $8,990 SGD|Avg: $5,690 SGD|-5.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 1$3,826 SGD
Retailer 13$3,842 SGD
Retailer 4$4,267 SGD
Retailer 3$4,517 SGD
Retailer 5$4,738 SGD
Retailer 8$4,835 SGD
Retailer 2$4,892 SGD
Retailer 7$4,911 SGD
Retailer 9$5,136 SGD
Retailer 14$5,320 SGD
Retailer 10$5,635 SGD
Retailer 12$5,864 SGD
Retailer 11$6,265 SGD
Retailer 6$8,894 SGD

25 data points across 14 retailers

24 retailers$3,826 SGD to $8,894 SGD

A
Cheapest Retailer
-
$3,826 SGD
A
Retailer 2
-
$3,842 SGD
View
B+
Retailer 3
-
$4,267 SGD
View
B+
Retailer 4
-
$4,517 SGD
View
B+
Retailer 5
-
$4,738 SGD
View
Final sale: no returns
B+
Retailer 6
-
$4,835 SGD
View
B+
Retailer 7
-
$4,892 SGD
View
B+
Retailer 8
-
$4,911 SGD
View
B+
Retailer 9
-
$5,021 SGD
View
Retailer 10
-
$5,133 SGD
View
Price last confirmed 43 days ago
Retailer 11
-
$5,133 SGD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$5,136 SGD
View
Retailer 13
-
$5,319 SGD
View
Price last confirmed 29 days ago
Retailer 14
-
$5,319 SGD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$5,320 SGD
View
B+
Retailer 16
-
$5,635 SGD
View
Retailer 17
-
$5,702 SGD
View
Price last confirmed 33 days ago
B+
Retailer 18
-
$5,864 SGD
View
Retailer 19
-
$6,136 SGD
View
Price last confirmed 45 days ago
Retailer 20
-
$6,136 SGD
View
Price last confirmed 33 days ago
B+
Retailer 21
-
$6,265 SGD
View
B
Retailer 22
-
$8,894 SGD
View
Retailer 23
-
$8,942 SGD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
c622d397-570c-4952-9c80-b0d5219df204 · Oct 3
$9,266 SGD
$7,254 USD
View
Price last confirmed 34 days ago
23 more retailers have this diamond
Prices start from $3,826 SGDSave up to $5,068 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
$3,826 SGD