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Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 5566477733

Certificate GIA 5566477733

Diamond specifications and retailer prices

From $9,631 AUD
SGD 9,121 SGD
As of November 1, 2026
Save $4,022 AUD (29%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $13,653 AUD at Diamonds Direct · As of November 1, 2026
View at Diamonds Direct

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5566477733. Listed at 12 retailers as of November 1, 2026, with prices from $9,631 to $13,653, a $4,022 spread on the same certified stone. Diamonds Direct lists it at $13,653. 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

1.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle39.9°
Pavilion angle38.11°
OriginNatural
Grading LabGIA
CertificateGIA 5566477733
Dimensions11.22 × 5.93 × 3.64 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.22 mm5.93 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5566477733
Side View
Table 59.0%Crown 39.9°Girdle: MED-THKPavilion 38.11°Culet: NoneDepth 61.5%

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 1
Current: $13,653 AUD|Low: $9,631 AUD|High: $13,653 AUD|Avg: $11,166 AUD
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 4$9,631 AUD
Retailer 7$10,001 AUD
Retailer 9$10,027 AUD
Retailer 8$10,045 AUD
Retailer 12$10,192 AUD
Retailer 11$10,332 AUD
Retailer 2$10,713 AUD
Retailer 3$11,998 AUD
Retailer 10$12,094 AUD
Retailer 6$12,176 AUD
Retailer 5$12,274 AUD
Diamonds Direct$13,653 AUD

31 data points across 12 retailers

12 retailers$9,631 AUD to $13,653 AUD

A
Cheapest Retailer
-
$9,631 AUD
SGD 9,121 SGD
A
Retailer 2
-
$10,001 AUD
$7,009 USD
View
A
Retailer 3
-
$10,027 AUD
SGD 9,496 SGD
View
B+
Retailer 4
-
$10,045 AUD
$7,040 USD
View
B+
Retailer 5
-
$10,192 AUD
$7,143 USD
View
B+
Retailer 6
-
$10,332 AUD
$7,241 USD
View
B+
Retailer 7
-
$10,713 AUD
£5,911 GBP
View
B+
Retailer 8
-
$11,998 AUD
$8,409 USD
View
B+
Retailer 9
-
$12,094 AUD
$8,476 USD
View
Retailer 10
-
$12,176 AUD
$8,533 USD
View
Price last confirmed 7 days ago
B+
Retailer 11
-
$12,274 AUD
€8,192 EUR
View
Most Expensive
B
Diamonds Direct
1129909 · Nov 1
$13,653 AUD
$9,568 USD
View
11 more retailers have this diamond
Prices start from $9,631 AUDSave up to $4,022 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
1.51ct Marquise
$9,631 AUD