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Marquise|Natural|GIA

1.01ct I SI1 Marquise Natural Diamond

ID • I/SI1 • GIA 1559004511

Certificate GIA 1559004511

Diamond specifications and retailer prices

From $2,480 SGD
£1,527 GBP
As of November 2, 2026
Save $3,722 SGD (60%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,203 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.01ct natural marquise diamond

This 1.01ct natural marquise sits in the classic one-carat band, graded I 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 1559004511. Listed at 8 retailers as of October 30, 2026, with prices from $2,480 to $6,203, a $3,722 spread on the same certified stone. NZ Jewellers lists it at $6,203. 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

1.01
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle42.17°
Pavilion angle40.84°
OriginNatural
Grading LabGIA
CertificateGIA 1559004511
Dimensions9.13 × 5.13 × 3.48 mm
L/W Ratio1.78
Girdle conditionVery Thick
Key to symbols
Crystal, Feather
Top View
9.13 mm5.13 mm1.01 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1559004511
Side View
Table 61.0%Crown 42.17°Girdle: Very ThickPavilion 40.84°Culet: NoneDepth 67.8%

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 2
Current: $6,203 SGD|Low: $2,480 SGD|High: $6,267 SGD|Avg: $3,394 SGD|+9.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 2$2,480 SGD
Retailer 7$2,542 SGD
Retailer 4$2,590 SGD
Retailer 5$2,660 SGD
Retailer 6$2,715 SGD
Retailer 9$2,750 SGD
Retailer 8$3,263 SGD
Retailer 3$4,455 SGD
NZ Jewellers$6,203 SGD

38 data points across 9 retailers

8 retailers$2,480 SGD to $6,203 SGD

A
Cheapest Retailer
-
$2,480 SGD
£1,527 GBP
A
Retailer 2
-
$2,542 SGD
$1,988 USD
View
A
Retailer 3
-
$2,590 SGD
$2,025 USD
View
A
Retailer 4
-
$2,660 SGD
$2,080 USD
View
A
Retailer 5
-
$2,715 SGD
$2,123 USD
View
Retailer 6
-
$3,263 SGD
A$3,926 AUD
View
Price last confirmed 27 days ago
B+
Retailer 7
-
$4,455 SGD
£2,743 GBP
View
Most Expensive
B
NZ Jewellers
52a5c3ca-3245-41f7-813a-018c244f3885 · Oct 30
$6,203 SGD
$4,850 USD
View
7 more retailers have this diamond
Prices start from $2,480 SGDSave up to $3,722 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
1.01ct Marquise
$2,480 SGD