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Marquise|Natural|GIA

1.51ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 5556475896

Certificate GIA 5556475896

Diamond specifications and retailer prices

From $14,748 AUD
$10,360 USD
As of November 1, 2026
Save $8,016 AUD (35%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $24,956 AUD at NZ Jewellers · As of September 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 5556475896. Listed at 17 retailers as of November 1, 2026, with a 54% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5556475896
Dimensions11.22 × 5.92 × 3.74 mm
L/W Ratio1.90
Top View
11.22 mm5.92 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5556475896
Side View
Table 57.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 63.2%

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 1
Current: $16,307 AUD|Low: $14,748 AUD|High: $23,605 AUD|Avg: $17,276 AUD|-3.9%
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 2, 2026
Retailer 11$14,748 AUD
Retailer 4$14,928 AUD
Retailer 5$15,052 AUD
Retailer 7$15,615 AUD
Retailer 12$15,866 AUD
Retailer 10$16,055 AUD
Retailer 13$16,090 AUD
Retailer 1$16,307 AUD
Retailer 2$17,371 AUD
Retailer 3$17,846 AUD
Retailer 6$18,360 AUD
Retailer 9$21,414 AUD
Retailer 8$22,764 AUD

35 data points across 13 retailers

17 retailers$14,748 AUD to $22,764 AUD

A
Cheapest Retailer
-
$14,748 AUD
$10,360 USD
B+
Retailer 2
-
$14,928 AUD
$10,486 USD
View
B+
Retailer 3
-
$15,615 AUD
£8,637 GBP
View
B+
Retailer 4
-
$15,866 AUD
$11,145 USD
View
Retailer 5
-
$16,055 AUD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$16,090 AUD
$11,302 USD
View
Final sale: no returns
B+
Retailer 7
-
$16,307 AUD
£9,020 GBP
View
Retailer 8
-
$16,528 AUD
$11,610 USD
View
Price last confirmed 25 days ago
B+
Retailer 9
-
$17,371 AUD
$12,202 USD
View
B+
Retailer 10
-
$17,846 AUD
$12,536 USD
View
Retailer 11
-
$17,905 AUD
$12,577 USD
View
Price last confirmed 25 days ago
Retailer 12
-
$18,181 AUD
$12,771 USD
View
Price last confirmed 32 days ago
B+
Retailer 13
-
$18,360 AUD
€12,283 EUR
View
Retailer 14
-
$20,659 AUD
$14,512 USD
View
Price last confirmed 34 days ago
B
Retailer 15
-
$21,414 AUD
ZAR 243,003 ZAR
View
B
Retailer 16
-
$22,764 AUD
£12,591 GBP
View
Most Expensive
NZ Jewellers
7136c892-d8bc-4c2c-b4b7-52dc21fd2e22 · Sep 30
$24,956 AUD
$17,530 USD
View
Price last confirmed 32 days ago
16 more retailers have this diamond
Prices start from $14,748 AUDSave up to $8,016 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
$14,748 AUD