CaratHunter
Plans
Marquise|Natural|GIA

1.51ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 5553731926

Certificate GIA 5553731926

Diamond specifications and retailer prices

From $12,751 AUD
$8,957 USD
As of October 31, 2026
Save $7,804 AUD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $20,555 AUD at NZ Jewellers · As of October 30, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5553731926. Listed at 9 retailers as of October 30, 2026, with prices from $12,751 to $20,555, a $7,804 spread on the same certified stone. NZ Jewellers lists it at $20,555. 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
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553731926
Dimensions10.94 × 5.98 × 3.80 mm
L/W Ratio1.83
Top View
10.94 mm5.98 mm1.51 ctD / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553731926
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.4%

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: Oct 31
Current: $20,555 AUD|Low: $12,751 AUD|High: $20,728 AUD|Avg: $14,975 AUD|-0.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 4$12,751 AUD
Retailer 5$12,784 AUD
Retailer 6$12,884 AUD
Retailer 9$13,662 AUD
Retailer 3$13,799 AUD
Retailer 8$14,748 AUD
Retailer 7$14,975 AUD
Retailer 2$19,262 AUD
NZ Jewellers$20,555 AUD

17 data points across 9 retailers

9 retailers$12,751 AUD to $20,555 AUD

A
Cheapest Retailer
-
$12,751 AUD
$8,957 USD
A
Retailer 2
-
$12,784 AUD
$8,980 USD
View
A
Retailer 3
-
$12,884 AUD
$9,050 USD
View
Retailer 4
-
$13,662 AUD
View
Price last confirmed 9 days ago
A
Retailer 5
-
$13,799 AUD
£7,632 GBP
View
B+
Retailer 6
-
$14,748 AUD
$10,360 USD
View
B+
Retailer 7
-
$14,975 AUD
$10,519 USD
View
B+
Retailer 8
-
$19,262 AUD
£10,654 GBP
View
Most Expensive
B
NZ Jewellers
5382c10c-e26f-43bf-a2f9-6991835ace68 · Oct 30
$20,555 AUD
$14,439 USD
View
8 more retailers have this diamond
Prices start from $12,751 AUDSave up to $7,804 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
$12,751 AUD