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Marquise|Natural|GIA

1.51ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 6552452687

Certificate GIA 6552452687

Diamond specifications and retailer prices

From $15,288 NZD
As of November 4, 2026
Save $1,360 NZD (8%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $19,410 NZD at Blue Nile · As of October 29, 2026
View at Blue Nile

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 6552452687. Listed at 5 retailers as of October 31, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6552452687
Dimensions11.39 × 5.94 × 3.76 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle, Indented Natural
Top View
11.39 mm5.94 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6552452687
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $19,410 NZD|Low: $14,861 NZD|High: $20,878 NZD|Avg: $17,270 NZD|-7.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 2$15,288 NZD
Retailer 4$15,505 NZD
Retailer 5$16,601 NZD
Retailer 3$16,648 NZD
Retailer 6$17,314 NZD
Retailer 7$18,737 NZD
Blue Nile$19,410 NZD

38 data points across 7 retailers

5 retailers$15,288 NZD to $16,648 NZD

A
Cheapest Retailer
-
$15,288 NZD
Retailer 2
-
$15,505 NZD
View
Price last confirmed 8 days ago
Retailer 3
-
$16,601 NZD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$16,648 NZD
View
Most Expensive
Blue Nile
29415853 · Oct 29
$19,410 NZD
$10,760 USD
View
Price last confirmed 8 days ago
4 more retailers have this diamond
Prices start from $15,288 NZDSave up to $1,360 NZD

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
$15,288 NZD