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Marquise|Natural|GIA

1.51ct K SI2 Marquise Natural Diamond

EX • K/SI2 • GIA 1565044917

Certificate GIA 1565044917

Diamond specifications and retailer prices

From $6,830 AUD
As of November 6, 2026
Save $2,562 AUD (27%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $14,458 AUD at NZ Jewellers · As of October 27, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1565044917. Listed at 15 retailers as of November 6, 2026, with a 38% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle37.49°
Pavilion angle41.62°
OriginNatural
Grading LabGIA
CertificateGIA 1565044917
Dimensions11.24 × 5.94 × 3.83 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.24 mm5.94 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1565044917
Side View
Table 59.0%Crown 37.49°Girdle: MED-THKPavilion 41.62°Culet: NDepth 64.5%

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 6
Current: $14,458 AUD|Low: $4,337 AUD|High: $14,458 AUD|Avg: $8,269 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 9$4,337 AUD
Retailer 8$6,420 AUD
Retailer 16$6,600 AUD
Retailer 2$6,830 AUD
Retailer 5$6,913 AUD
Retailer 4$7,289 AUD
Retailer 10$7,440 AUD
Retailer 3$7,832 AUD
Retailer 17$7,832 AUD
Retailer 18$7,832 AUD
Retailer 14$8,405 AUD
Retailer 6$8,440 AUD
Retailer 11$8,615 AUD
Retailer 13$9,037 AUD
Retailer 12$9,392 AUD
Retailer 7$9,536 AUD
Retailer 15$12,803 AUD
NZ Jewellers$14,458 AUD

23 data points across 18 retailers

15 retailers$6,830 AUD to $9,392 AUD

Retailer 1
-
$6,600 AUD
Price last confirmed 10 days ago
B+
Retailer 2
-
$6,830 AUD
View
Retailer 3
-
$6,913 AUD
View
Price last confirmed 15 days ago
B+
Retailer 4
-
$7,289 AUD
View
Retailer 5
-
$7,832 AUD
View
Price last confirmed 13 days ago
Retailer 6
-
$7,832 AUD
View
Price last confirmed 13 days ago
Retailer 7
-
$7,832 AUD
View
Price last confirmed 12 days ago
Retailer 8
-
$8,405 AUD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$8,440 AUD
View
B+
Retailer 10
-
$8,615 AUD
View
B+
Retailer 11
-
$9,037 AUD
View
B
Retailer 12
-
$9,392 AUD
View
Retailer 13
-
$9,536 AUD
View
Price last confirmed 24 days ago
Retailer 14
-
$12,803 AUD
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
806b2da5-6dec-4d07-8cc4-99c803ea1106 · Oct 27
$14,458 AUD
$9,934 USD
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from $6,830 AUDSave up to $2,562 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
$6,830 AUD