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Marquise|Natural|GIA

1.00ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 2556243794

Certificate GIA 2556243794

Diamond specifications and retailer prices

From $2,454 SGD
As of November 6, 2026
Save $3,301 SGD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $6,889 SGD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556243794. Listed at 19 retailers as of November 4, 2026, with a 135% 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2556243794
Dimensions9.61 × 5.14 × 3.30 mm
L/W Ratio1.87
Top View
9.61 mm5.14 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2556243794
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.3%

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: $6,889 SGD|Low: $2,454 SGD|High: $6,889 SGD|Avg: $4,062 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
November 6, 2026
Retailer 2$2,454 SGD
Retailer 9$2,890 SGD
Retailer 11$3,040 SGD
Retailer 4$3,262 SGD
Retailer 3$3,448 SGD
Retailer 5$3,465 SGD
Retailer 12$3,691 SGD
Retailer 6$4,022 SGD
Retailer 8$4,113 SGD
Retailer 10$4,742 SGD
Retailer 7$5,756 SGD
NZ Jewellers$6,889 SGD

34 data points across 12 retailers

19 retailers$2,454 SGD to $5,756 SGD

A
Cheapest Retailer
-
$2,454 SGD
B+
Retailer 2
-
$2,890 SGD
View
B+
Retailer 3
-
$2,950 SGD
View
B+
Retailer 4
-
$3,008 SGD
View
B+
Retailer 5
-
$3,040 SGD
View
Final sale: no returns
B
Retailer 6
-
$3,262 SGD
View
Retailer 7
-
$3,295 SGD
View
Price last confirmed 46 days ago
Retailer 8
-
$3,295 SGD
View
Price last confirmed 26 days ago
Retailer 9
-
$3,295 SGD
View
Price last confirmed 30 days ago
B
Retailer 10
-
$3,465 SGD
View
Retailer 11
-
$3,691 SGD
View
Price last confirmed 31 days ago
B
Retailer 12
-
$3,788 SGD
View
Retailer 13
-
$3,803 SGD
View
Price last confirmed 46 days ago
Retailer 14
-
$3,803 SGD
View
Price last confirmed 29 days ago
B
Retailer 15
-
$4,022 SGD
View
B
Retailer 16
-
$4,113 SGD
View
Retailer 17
-
$4,742 SGD
View
Price last confirmed 11 days ago
B
Retailer 18
-
$5,756 SGD
View
Most Expensive
NZ Jewellers
24ef520f-79b3-42a4-b61e-99c23dea28c3 · Sep 30
$6,889 SGD
$5,375 USD
View
Price last confirmed 37 days ago
18 more retailers have this diamond
Prices start from $2,454 SGDSave up to $3,301 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
$2,454 SGD