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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

GD • G/SI1 • GIA 6561587509

Certificate GIA 6561587509

Diamond specifications and retailer prices

From $11,250 AUD
As of November 4, 2026
Save $8,916 AUD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $20,166 AUD at With Clarity · As of November 6, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6561587509. Listed at 13 retailers as of November 4, 2026, with prices from $11,250 to $20,166, a $8,916 spread on the same certified stone. With Clarity lists it at $20,166. 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
G
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.81°
Pavilion angle40.54°
OriginNatural
Grading LabGIA
CertificateGIA 6561587509
Dimensions10.64 × 5.84 × 3.94 mm
L/W Ratio1.82
Culet sizeNone
Top View
10.64 mm5.84 mm1.51 ctG / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561587509
Side View
Table 61.0%Crown 43.81°Girdle: VTN-VTKPavilion 40.54°Culet: NoneDepth 67.5%

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: Nov 4
Current: $12,652 AUD|Low: $11,250 AUD|High: $20,166 AUD|Avg: $13,708 AUD|-18.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
With Clarity
November 6, 2026
Retailer 4$11,250 AUD
Retailer 11$11,911 AUD
Retailer 10$12,383 AUD
Retailer 2$12,553 AUD
Retailer 1$12,652 AUD
Retailer 6$12,693 AUD
Retailer 12$12,706 AUD
Retailer 3$14,451 AUD
Retailer 7$14,587 AUD
Retailer 5$14,841 AUD
Retailer 8$14,858 AUD
Retailer 9$18,267 AUD
With Clarity$20,166 AUD

8 data points across 13 retailers

13 retailers$11,250 AUD to $20,166 AUD

B+
Cheapest Retailer
-
$11,250 AUD
B+
Retailer 2
-
$11,911 AUD
View
B+
Retailer 3
-
$12,383 AUD
View
B+
Retailer 4
-
$12,553 AUD
View
B+
Retailer 5
-
$12,652 AUD
View
B+
Retailer 6
-
$12,693 AUD
View
B+
Retailer 7
-
$12,706 AUD
View
B
Retailer 8
-
$14,451 AUD
View
B
Retailer 9
-
$14,587 AUD
View
B
Retailer 10
-
$14,841 AUD
View
B
Retailer 11
-
$14,858 AUD
View
B
Retailer 12
-
$18,267 AUD
View
Most Expensive
B
With Clarity
6561587509 · Nov 6
$20,166 AUD
$13,856 USD
View
12 more retailers have this diamond
Prices start from $11,250 AUDSave up to $8,916 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+
1.51ct Marquise
$11,250 AUD