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Marquise|Natural|GIA

1.51ct F SI1 Marquise Natural Diamond

ID • F/SI1 • GIA 6555004556

Certificate GIA 6555004556

Diamond specifications and retailer prices

From $15,786 NZD
$8,882 USD
As of November 2, 2026
Save $9,654 NZD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $25,440 NZD 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 F 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 6555004556. Listed at 9 retailers as of October 30, 2026, with prices from $15,786 to $25,440, a $9,654 spread on the same certified stone. NZ Jewellers lists it at $25,440. 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
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle37.35°
Pavilion angle41.16°
OriginNatural
Grading LabGIA
CertificateGIA 6555004556
Dimensions11.20 × 5.96 × 3.80 mm
L/W Ratio1.88
Top View
11.20 mm5.96 mm1.51 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6555004556
Side View
Table 61.0%Crown 37.35°Girdle: ThickPavilion 41.16°Culet: NoneDepth 63.8%

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 2
Current: $25,440 NZD|Low: $15,786 NZD|High: $25,440 NZD|Avg: $19,322 NZD
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 2, 2026
Retailer 9$15,786 NZD
Retailer 10$16,689 NZD
Retailer 7$16,762 NZD
Retailer 2$17,077 NZD
Retailer 13$17,826 NZD
Retailer 12$18,253 NZD
Retailer 11$18,264 NZD
Retailer 8$18,534 NZD
Retailer 3$18,782 NZD
Retailer 5$21,368 NZD
Retailer 4$21,489 NZD
Retailer 6$23,838 NZD
NZ Jewellers$25,440 NZD

21 data points across 13 retailers

9 retailers$15,786 NZD to $25,440 NZD

B+
Cheapest Retailer
-
$15,786 NZD
$8,882 USD
B+
Retailer 2
-
$16,689 NZD
$9,390 USD
View
Retailer 3
-
$16,762 NZD
A$14,510 AUD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$17,077 NZD
£7,566 GBP
View
B+
Retailer 5
-
$18,253 NZD
$10,270 USD
View
B+
Retailer 6
-
$18,264 NZD
$10,276 USD
View
B+
Retailer 7
-
$18,534 NZD
$10,428 USD
View
B
Retailer 8
-
$23,838 NZD
£10,561 GBP
View
Most Expensive
B
NZ Jewellers
45b6177d-5acf-4cbc-812e-31be09da4409 · Oct 30
$25,440 NZD
$14,314 USD
View
8 more retailers have this diamond
Prices start from $15,786 NZDSave up to $9,654 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.

B+
1.51ct Marquise
$15,786 NZD