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Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

VG • K/SI1 • GIA 2548860643

Certificate GIA 2548860643

Diamond specifications and retailer prices

From $6,113 AUD
As of November 4, 2026
Save $6,174 AUD (50%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,939 AUD at NZ Jewellers · As of September 20, 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2548860643. Listed at 15 retailers as of November 4, 2026, with a 101% 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
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle40.53°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2548860643
Dimensions10.87 × 5.88 × 3.84 mm
L/W Ratio1.85
Top View
10.87 mm5.88 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2548860643
Side View
Table 63.0%Crown 40.53°Girdle: STK-VTKPavilion 41°Culet: NoneDepth 65.4%

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 4
Current: $7,504 AUD|Low: $5,666 AUD|High: $12,468 AUD|Avg: $7,753 AUD|-1.5%
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 5$5,666 AUD
Retailer 3$6,113 AUD
Retailer 13$6,523 AUD
Retailer 12$6,608 AUD
Retailer 2$7,008 AUD
Retailer 10$7,086 AUD
Retailer 1$7,504 AUD
Retailer 7$7,645 AUD
Retailer 11$7,904 AUD
Retailer 4$8,537 AUD
Retailer 6$8,705 AUD
Retailer 8$9,438 AUD
Retailer 9$12,286 AUD

36 data points across 13 retailers

15 retailers$6,113 AUD to $12,286 AUD

A
Cheapest Retailer
-
$6,113 AUD
B+
Retailer 2
-
$6,523 AUD
View
B+
Retailer 3
-
$6,608 AUD
View
Retailer 4
-
$7,008 AUD
View
Price last confirmed 22 days ago
B+
Retailer 5
-
$7,086 AUD
View
B+
Retailer 6
-
$7,504 AUD
View
B+
Retailer 7
-
$7,645 AUD
View
Retailer 8
-
$7,735 AUD
View
Price last confirmed 47 days ago
B+
Retailer 9
-
$7,904 AUD
View
Retailer 10
-
$8,537 AUD
View
Price last confirmed 24 days ago
B+
Retailer 11
-
$8,705 AUD
View
Retailer 12
-
$8,926 AUD
View
Price last confirmed 46 days ago
B
Retailer 13
-
$9,438 AUD
View
B
Retailer 14
-
$12,286 AUD
View
Most Expensive
NZ Jewellers
e91bf884-fde8-4fe4-a5dc-c166c9bfdf8a · Sep 20
$12,939 AUD
$8,890 USD
View
Price last confirmed 47 days ago
14 more retailers have this diamond
Prices start from $6,113 AUDSave up to $6,174 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
$6,113 AUD