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Marquise|Natural|GIA

0.90ct D SI1 Marquise Natural Diamond

GD • D/SI1 • GIA 2566609346

Certificate GIA 2566609346

Diamond specifications and retailer prices

From $3,378 AUD
SGD 3,207 SGD
As of October 31, 2026
Save $2,930 AUD (46%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,308 AUD at Helzberg Diamonds · As of November 2, 2026
View at Helzberg Diamonds

About this 0.9ct natural marquise diamond

This 0.9ct natural marquise sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2566609346. Listed at 13 retailers as of October 31, 2026, with prices from $3,378 to $6,308, a $2,930 spread on the same certified stone. Helzberg Diamonds lists it at $6,308. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.90
Carat
D
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle39.22°
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 2566609346
Dimensions9.00 × 4.94 × 3.26 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.00 mm4.94 mm0.90 ctD / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2566609346
Side View
Table 59.0%Crown 39.22°Girdle: STK-VTKPavilion 40.2°Culet: NoneDepth 66.1%

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: Oct 31
Current: $6,308 AUD|Low: $3,606 AUD|High: $6,308 AUD|Avg: $4,476 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 12$3,606 AUD
Retailer 10$3,616 AUD
Retailer 9$3,643 AUD
Retailer 11$3,670 AUD
Retailer 5$3,930 AUD
Retailer 4$3,995 AUD
Retailer 6$4,304 AUD
Retailer 3$4,467 AUD
Retailer 2$4,726 AUD
Retailer 8$5,593 AUD
Retailer 7$5,942 AUD
Helzberg Diamonds$6,308 AUD

18 data points across 12 retailers

13 retailers$3,378 AUD to $6,308 AUD

B+
Cheapest Retailer
-
$3,378 AUD
SGD 3,207 SGD
B+
Retailer 2
-
$3,606 AUD
$2,533 USD
View
B+
Retailer 3
-
$3,616 AUD
$2,540 USD
View
B+
Retailer 4
-
$3,643 AUD
$2,559 USD
View
B+
Retailer 5
-
$3,670 AUD
$2,578 USD
View
B+
Retailer 6
-
$3,930 AUD
£2,174 GBP
View
B
Retailer 7
-
$3,995 AUD
SGD 3,792 SGD
View
B
Retailer 8
-
$4,304 AUD
$3,023 USD
View
B
Retailer 9
-
$4,467 AUD
$3,138 USD
View
B
Retailer 10
-
$4,726 AUD
€3,162 EUR
View
B
Retailer 11
-
$5,593 AUD
$3,929 USD
View
B
Retailer 12
-
$5,942 AUD
$4,174 USD
View
Most Expensive
C
Helzberg Diamonds
XZRILMMMGPJKM · Nov 2
$6,308 AUD
$4,431 USD
View
12 more retailers have this diamond
Prices start from $3,378 AUDSave up to $2,930 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.

B+
0.90ct Marquise
$3,378 AUD