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Marquise|Natural|GIA

1.00ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6555512678

Certificate GIA 6555512678

Diamond specifications and retailer prices

From $2,666 SGD
As of November 6, 2026
Save $3,870 SGD (59%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $6,536 SGD at NZ Jewellers · As of November 5, 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 6555512678. Listed at 18 retailers as of November 5, 2026, with prices from $2,666 to $6,536, a $3,870 spread on the same certified stone. NZ Jewellers lists it at $6,536. 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
SymmetryExcellent
FluorescenceNone
Crown angle37°
OriginNatural
Grading LabGIA
CertificateGIA 6555512678
Dimensions9.77 × 5.25 × 3.39 mm
L/W Ratio1.86
Culet sizeNone
Key to symbols
Feather, Crystal, Pinpoint, Knot
Top View
9.77 mm5.25 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555512678
Side View
Table 61.0%Crown 37°Girdle: STK-VTKPavilionCulet: NDepth 64.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,536 SGD|Low: $2,666 SGD|High: $6,654 SGD|Avg: $3,603 SGD|-1.8%
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 6, 2026
Retailer 9$2,666 SGD
Retailer 4$2,825 SGD
Retailer 5$2,885 SGD
Retailer 2$3,032 SGD
Retailer 14$3,108 SGD
Retailer 7$3,127 SGD
Retailer 17$3,127 SGD
Retailer 6$3,271 SGD
Retailer 3$3,305 SGD
Retailer 11$3,308 SGD
Retailer 16$3,391 SGD
Retailer 8$3,396 SGD
Retailer 15$3,608 SGD
Retailer 10$3,815 SGD
Retailer 13$3,887 SGD
Retailer 12$5,462 SGD
NZ Jewellers$6,536 SGD

27 data points across 17 retailers

18 retailers$2,666 SGD to $6,536 SGD

B+
Cheapest Retailer
-
$2,666 SGD
B+
Retailer 2
-
$2,825 SGD
View
B+
Retailer 3
-
$2,885 SGD
View
Final sale: no returns
B+
Retailer 4
-
$3,032 SGD
View
B+
Retailer 5
-
$3,108 SGD
View
B+
Retailer 6
-
$3,127 SGD
View
Retailer 7
-
$3,127 SGD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$3,271 SGD
View
B+
Retailer 9
-
$3,305 SGD
View
B+
Retailer 10
-
$3,308 SGD
View
B
Retailer 11
-
$3,391 SGD
View
B
Retailer 12
-
$3,396 SGD
View
B+
Retailer 13
-
$3,608 SGD
View
B
Retailer 14
-
$3,815 SGD
View
B
Retailer 15
-
$3,887 SGD
View
Retailer 16
-
$4,069 SGD
View
Price last confirmed 31 days ago
B
Retailer 17
-
$5,462 SGD
View
Most Expensive
B
NZ Jewellers
71be0534-a66f-4f59-9929-7973de153c9d · Nov 5
$6,536 SGD
$5,100 USD
View
17 more retailers have this diamond
Prices start from $2,666 SGDSave up to $3,870 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.

B+
1.00ct Marquise
$2,666 SGD