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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6565379734

Certificate GIA 6565379734

Diamond specifications and retailer prices

From $4,319 SGD
As of November 6, 2026
Save $4,468 SGD (51%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,787 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct 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 6565379734. Listed at 15 retailers as of November 5, 2026, with prices from $4,319 to $8,787, a $4,468 spread on the same certified stone. NZ Jewellers lists it at $8,787. 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6565379734
Dimensions10.33 × 5.62 × 3.42 mm
L/W Ratio1.84
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cavity, Knot, Needle
Top View
10.33 mm5.62 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6565379734
Side View
Table 63.0%CrownGirdle: VTN-VTKPavilionCulet: NoneDepth 60.9%

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: $8,787 SGD|Low: $4,319 SGD|High: $8,787 SGD|Avg: $5,504 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
November 6, 2026
Retailer 7$4,319 SGD
Retailer 11$4,383 SGD
Retailer 12$4,516 SGD
Retailer 15$4,800 SGD
Retailer 4$4,932 SGD
Retailer 10$5,017 SGD
Retailer 13$5,017 SGD
Retailer 8$5,126 SGD
Retailer 3$5,216 SGD
Retailer 5$5,216 SGD
Retailer 6$5,396 SGD
Retailer 2$5,586 SGD
Retailer 14$7,359 SGD
Retailer 9$8,434 SGD
NZ Jewellers$8,787 SGD

35 data points across 15 retailers

15 retailers$4,319 SGD to $8,787 SGD

B+
Cheapest Retailer
-
$4,319 SGD
B+
Retailer 2
-
$4,383 SGD
View
B+
Retailer 3
-
$4,516 SGD
View
B
Retailer 4
-
$4,800 SGD
View
B
Retailer 5
-
$4,932 SGD
View
B
Retailer 6
-
$5,017 SGD
View
B
Retailer 7
-
$5,017 SGD
View
B
Retailer 8
-
$5,126 SGD
View
B
Retailer 9
-
$5,216 SGD
View
B
Retailer 10
-
$5,216 SGD
View
B
Retailer 11
-
$5,396 SGD
View
B
Retailer 12
-
$5,586 SGD
View
B
Retailer 13
-
$7,359 SGD
View
B
Retailer 14
-
$8,434 SGD
View
Most Expensive
B
NZ Jewellers
617fe7ef-dabd-4410-8bcc-3b14343cc3c6 · Nov 5
$8,787 SGD
$6,856 USD
View
14 more retailers have this diamond
Prices start from $4,319 SGDSave up to $4,468 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+
1.20ct Marquise
$4,319 SGD