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Marquise|Natural|GIA

1.00ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 2566126580

Certificate GIA 2566126580

Diamond specifications and retailer prices

From $3,591 SGD
As of November 1, 2026
Save $4,382 SGD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,306 SGD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2566126580. Listed at 21 retailers as of November 1, 2026, with a 122% 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2566126580
Dimensions9.69 × 5.23 × 3.22 mm
L/W Ratio1.85
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Knot, Crystal, Indented Natural, Natural
Top View
9.69 mm5.23 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2566126580
Side View
Table 60.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 61.6%

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 1
Current: $8,306 SGD|Low: $3,558 SGD|High: $8,306 SGD|Avg: $5,275 SGD
NZ Jewellers
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
Retailer 15
Retailer 16
Retailer 17
November 4, 2026
Retailer 15$3,591 SGD
Retailer 11$3,759 SGD
Retailer 12$4,206 SGD
Retailer 3$4,273 SGD
Retailer 17$4,337 SGD
Retailer 6$4,400 SGD
Retailer 8$4,532 SGD
Retailer 4$4,767 SGD
Retailer 2$4,934 SGD
Retailer 7$4,953 SGD
Retailer 9$5,129 SGD
Retailer 5$5,501 SGD
Retailer 10$5,558 SGD
Retailer 14$5,859 SGD
Retailer 16$7,362 SGD
Retailer 13$7,973 SGD
NZ Jewellers$8,306 SGD

31 data points across 17 retailers

21 retailers$3,591 SGD to $7,973 SGD

A
Cheapest Retailer
-
$3,591 SGD
A
Retailer 2
-
$3,759 SGD
View
A
Retailer 3
-
$4,206 SGD
View
A
Retailer 4
-
$4,273 SGD
View
A
Retailer 5
-
$4,337 SGD
View
B+
Retailer 6
-
$4,396 SGD
View
B+
Retailer 7
-
$4,400 SGD
View
Final sale: no returns
B+
Retailer 8
-
$4,401 SGD
View
Retailer 9
-
$4,532 SGD
View
Price last confirmed 8 days ago
Retailer 10
-
$4,767 SGD
View
Price last confirmed 17 days ago
Retailer 11
-
$4,767 SGD
View
Price last confirmed 19 days ago
B+
Retailer 12
-
$4,934 SGD
View
Retailer 13
-
$4,951 SGD
View
Price last confirmed 19 days ago
B+
Retailer 14
-
$4,953 SGD
View
Retailer 15
-
$5,129 SGD
View
Price last confirmed 27 days ago
Retailer 16
-
$5,501 SGD
View
Price last confirmed 16 days ago
B+
Retailer 17
-
$5,558 SGD
View
B+
Retailer 18
-
$5,859 SGD
View
B
Retailer 19
-
$7,362 SGD
View
B
Retailer 20
-
$7,973 SGD
View
Most Expensive
NZ Jewellers
29855469-973e-45d7-8135-5312df9dd88e · Oct 17
$8,306 SGD
$6,483 USD
View
Price last confirmed 17 days ago
20 more retailers have this diamond
Prices start from $3,591 SGDSave up to $4,382 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 Marquise
$3,591 SGD