CaratHunter
Plans
Marquise|Natural|GIA

1.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 1445475696

Certificate GIA 1445475696

Diamond specifications and retailer prices

From $5,979 AUD
As of November 6, 2026
Save $7,372 AUD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $13,350 AUD at NZ Jewellers · As of November 5, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1445475696. Listed at 16 retailers as of November 5, 2026, with prices from $5,979 to $13,350, a $7,372 spread on the same certified stone. NZ Jewellers lists it at $13,350. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1445475696
Dimensions12.03 × 6.11 × 3.49 mm
L/W Ratio1.97
Key to symbols
Feather
Top View
12.03 mm6.11 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1445475696
Side View
Table 58.0%CrownGirdle: ThickPavilionCulet: NoneDepth 57.1%

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 6
Current: $13,350 AUD|Low: $5,923 AUD|High: $13,350 AUD|Avg: $8,429 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
November 6, 2026
Retailer 10$5,979 AUD
Retailer 2$6,344 AUD
Retailer 4$7,028 AUD
Retailer 12$7,604 AUD
Retailer 6$7,744 AUD
Retailer 8$7,786 AUD
Retailer 11$7,983 AUD
Retailer 13$7,983 AUD
Retailer 3$8,428 AUD
Retailer 7$8,983 AUD
Retailer 5$9,210 AUD
Retailer 9$12,713 AUD
NZ Jewellers$13,350 AUD

31 data points across 13 retailers

16 retailers$5,979 AUD to $13,350 AUD

A
Cheapest Retailer
-
$5,979 AUD
A
Retailer 2
-
$6,344 AUD
View
B+
Retailer 3
-
$7,028 AUD
View
B+
Retailer 4
-
$7,035 AUD
View
Retailer 5
-
$7,421 AUD
View
Price last confirmed 90 days ago
B+
Retailer 6
-
$7,524 AUD
View
Retailer 7
-
$7,604 AUD
View
Price last confirmed 11 days ago
B+
Retailer 8
-
$7,744 AUD
View
B+
Retailer 9
-
$7,786 AUD
View
B+
Retailer 10
-
$7,983 AUD
View
B+
Retailer 11
-
$7,983 AUD
View
B+
Retailer 12
-
$8,428 AUD
View
B
Retailer 13
-
$8,983 AUD
View
B
Retailer 14
-
$9,210 AUD
View
B
Retailer 15
-
$12,713 AUD
View
Most Expensive
B
NZ Jewellers
65f84ebf-99d5-4b50-bf6a-d5555edcd2fd · Nov 5
$13,350 AUD
$9,173 USD
View
15 more retailers have this diamond
Prices start from $5,979 AUDSave up to $7,372 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
$5,979 AUD