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Marquise|Natural|GIA

1.51ct E SI1 Marquise Natural Diamond

VG • E/SI1 • GIA 6552657128

Certificate GIA 6552657128

Diamond specifications and retailer prices

From $11,180 AUD
SGD 10,613 SGD
As of November 1, 2026
Save $8,857 AUD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $20,037 AUD at With Clarity · As of November 1, 2026
View at With Clarity

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6552657128. Listed at 13 retailers as of November 1, 2026, with prices from $11,180 to $20,037, a $8,857 spread on the same certified stone. With Clarity lists it at $20,037. 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

1.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.86°
Pavilion angle39.05°
OriginNatural
Grading LabGIA
CertificateGIA 6552657128
Dimensions10.95 × 5.90 × 3.67 mm
L/W Ratio1.86
Culet sizeNone
Top View
10.95 mm5.90 mm1.51 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552657128
Side View
Table 62.0%Crown 39.86°Girdle: THN-THKPavilion 39.05°Culet: NoneDepth 62.2%

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: $12,736 AUD|Low: $11,180 AUD|High: $21,287 AUD|Avg: $14,146 AUD|-5.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
With Clarity
November 1, 2026
Retailer 5$11,180 AUD
Retailer 8$11,833 AUD
Retailer 7$12,101 AUD
Retailer 9$12,102 AUD
Retailer 10$12,303 AUD
Retailer 6$12,471 AUD
Retailer 1$12,736 AUD
Retailer 3$14,348 AUD
Retailer 11$14,485 AUD
Retailer 4$14,807 AUD
Retailer 2$14,815 AUD
With Clarity$20,037 AUD

39 data points across 12 retailers

13 retailers$11,180 AUD to $20,037 AUD

A
Cheapest Retailer
-
$11,180 AUD
SGD 10,613 SGD
A
Retailer 2
-
$11,833 AUD
$8,312 USD
View
A
Retailer 3
-
$12,101 AUD
$8,500 USD
View
A
Retailer 4
-
$12,102 AUD
SGD 11,488 SGD
View
A
Retailer 5
-
$12,303 AUD
$8,642 USD
View
A
Retailer 6
-
$12,471 AUD
$8,760 USD
View
A
Retailer 7
-
$12,736 AUD
£7,044 GBP
View
B+
Retailer 8
-
$14,348 AUD
$10,079 USD
View
B+
Retailer 9
-
$14,485 AUD
$10,175 USD
View
B+
Retailer 10
-
$14,807 AUD
€9,906 EUR
View
B+
Retailer 11
-
$14,815 AUD
$10,407 USD
View
B+
Retailer 12
-
$15,635 AUD
$10,983 USD
View
Most Expensive
B
With Clarity
6552657128 · Nov 1
$20,037 AUD
$14,075 USD
View
12 more retailers have this diamond
Prices start from $11,180 AUDSave up to $8,857 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
$11,180 AUD