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Marquise|Natural|GIA

1.51ct K SI2 Marquise Natural Diamond

VG • K/SI2 • GIA 2556257527

Certificate GIA 2556257527

Diamond specifications and retailer prices

From $5,825 AUD
As of November 5, 2026
Save $6,862 AUD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $13,566 AUD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2556257527. Listed at 14 retailers as of November 4, 2026, with a 118% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556257527
Dimensions10.91 × 5.89 × 3.88 mm
L/W Ratio1.85
Girdle conditionFaceted
Top View
10.91 mm5.89 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556257527
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.9%

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: $6,523 AUD|Low: $5,825 AUD|High: $13,072 AUD|Avg: $7,886 AUD|-2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 3$5,825 AUD
Retailer 8$5,849 AUD
Retailer 13$6,321 AUD
Retailer 4$6,469 AUD
Retailer 1$6,523 AUD
Retailer 11$6,570 AUD
Retailer 7$6,986 AUD
Retailer 2$7,123 AUD
Retailer 9$7,536 AUD
Retailer 5$7,689 AUD
Retailer 12$8,884 AUD
Retailer 6$11,806 AUD
Retailer 10$12,687 AUD

27 data points across 13 retailers

14 retailers$5,825 AUD to $12,687 AUD

A
Cheapest Retailer
-
$5,825 AUD
A
Retailer 2
-
$5,849 AUD
View
A
Retailer 3
-
$6,321 AUD
View
B+
Retailer 4
-
$6,469 AUD
View
B+
Retailer 5
-
$6,523 AUD
View
Final sale: no returns
A
Retailer 6
-
$6,570 AUD
View
B+
Retailer 7
-
$6,986 AUD
View
B+
Retailer 8
-
$7,123 AUD
View
B+
Retailer 9
-
$7,536 AUD
View
B+
Retailer 10
-
$7,689 AUD
View
B+
Retailer 11
-
$8,884 AUD
View
B
Retailer 12
-
$11,806 AUD
View
B
Retailer 13
-
$12,687 AUD
View
Most Expensive
NZ Jewellers
8d27364e-0cc6-4b8a-ac56-fb8dae0ef48c · Sep 25
$13,566 AUD
$9,321 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $5,825 AUDSave up to $6,862 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
$5,825 AUD