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Marquise|Natural|GIA

1.01ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 1553986435

Certificate GIA 1553986435

Diamond specifications and retailer prices

From $3,513 AUD
As of November 5, 2026
Save $2,877 AUD (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,390 AUD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.01ct natural marquise diamond

This 1.01ct natural marquise sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553986435. Listed at 11 retailers as of November 5, 2026, with prices from $3,513 to $6,390, a $2,877 spread on the same certified stone. Helzberg Diamonds lists it at $6,390. 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
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.53°
Pavilion angle40.82°
OriginNatural
Grading LabGIA
CertificateGIA 1553986435
Dimensions9.99 × 5.27 × 3.33 mm
L/W Ratio1.90
Culet sizeNone
Top View
9.99 mm5.27 mm1.01 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553986435
Side View
Table 59.0%Crown 37.53°Girdle: STK-THKPavilion 40.82°Culet: NoneDepth 63.1%

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 5
Current: $6,390 AUD|Low: $3,493 AUD|High: $6,621 AUD|Avg: $4,468 AUD|-3.5%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5$3,513 AUD
Retailer 11$3,584 AUD
Retailer 6$3,718 AUD
Retailer 3$3,730 AUD
Retailer 4$3,951 AUD
Retailer 10$4,047 AUD
Retailer 8$4,358 AUD
Retailer 9$4,520 AUD
Retailer 2$4,770 AUD
Retailer 7$6,075 AUD
Helzberg Diamonds$6,390 AUD

44 data points across 11 retailers

11 retailers$3,513 AUD to $6,390 AUD

A
Cheapest Retailer
-
$3,513 AUD
A
Retailer 2
-
$3,584 AUD
View
A
Retailer 3
-
$3,718 AUD
View
A
Retailer 4
-
$3,730 AUD
View
A
Retailer 5
-
$3,951 AUD
View
A
Retailer 6
-
$4,047 AUD
View
A
Retailer 7
-
$4,358 AUD
View
A
Retailer 8
-
$4,520 AUD
View
A
Retailer 9
-
$4,770 AUD
View
B+
Retailer 10
-
$6,075 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLJPOMKJL · Nov 6
$6,390 AUD
$4,473 USD
View
10 more retailers have this diamond
Prices start from $3,513 AUDSave up to $2,877 AUD

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
$3,513 AUD