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Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 1555023523

Certificate GIA 1555023523

Diamond specifications and retailer prices

From $3,597 SGD
As of November 6, 2026
Save $4,271 SGD (54%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $8,795 SGD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded E 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 1555023523. Listed at 25 retailers as of November 4, 2026, with a 119% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555023523
Dimensions9.87 × 5.19 × 3.24 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle, Indented Natural, Natural
Top View
9.87 mm5.19 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1555023523
Side View
Table 62.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.4%

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: Nov 6
Current: $4,577 SGD|Low: $3,597 SGD|High: $7,975 SGD|Avg: $5,265 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
Retailer 13
November 6, 2026
Retailer 13$3,597 SGD
Retailer 8$3,739 SGD
Retailer 9$4,211 SGD
Retailer 5$4,267 SGD
Retailer 2$4,394 SGD
Retailer 1$4,577 SGD
Retailer 4$4,718 SGD
Retailer 6$4,854 SGD
Retailer 12$4,900 SGD
Retailer 11$5,501 SGD
Retailer 7$5,759 SGD
Retailer 3$7,307 SGD
Retailer 10$7,868 SGD

24 data points across 13 retailers

25 retailers$3,597 SGD to $7,868 SGD

A
Cheapest Retailer
-
$3,597 SGD
A
Retailer 2
-
$3,739 SGD
View
A
Retailer 3
-
$4,211 SGD
View
A
Retailer 4
-
$4,256 SGD
View
A
Retailer 5
-
$4,267 SGD
View
A
Retailer 6
-
$4,354 SGD
View
Final sale: no returns
A
Retailer 7
-
$4,394 SGD
View
B+
Retailer 8
-
$4,394 SGD
View
B+
Retailer 9
-
$4,533 SGD
View
A
Retailer 10
-
$4,577 SGD
View
Retailer 11
-
$4,718 SGD
View
Price last confirmed 8 days ago
Retailer 12
-
$4,718 SGD
View
Price last confirmed 21 days ago
B+
Retailer 13
-
$4,854 SGD
View
B+
Retailer 14
-
$4,900 SGD
View
B+
Retailer 15
-
$4,904 SGD
View
B+
Retailer 16
-
$4,905 SGD
View
B+
Retailer 17
-
$4,969 SGD
View
Retailer 18
-
$5,049 SGD
View
Price last confirmed 38 days ago
Retailer 19
-
$5,127 SGD
View
Price last confirmed 29 days ago
B+
Retailer 20
-
$5,501 SGD
View
B+
Retailer 21
-
$5,759 SGD
View
Retailer 22
-
$5,826 SGD
View
Price last confirmed 38 days ago
Retailer 23
-
$7,307 SGD
View
Price last confirmed 9 days ago
B
Retailer 24
-
$7,868 SGD
View
Most Expensive
NZ Jewellers
59feb36f-121a-4f76-9f73-37702296f960 · Sep 29
$8,795 SGD
$6,886 USD
View
Price last confirmed 37 days ago
24 more retailers have this diamond
Prices start from $3,597 SGDSave up to $4,271 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
$3,597 SGD