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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5566372644

Certificate GIA 5566372644

Diamond specifications and retailer prices

From $11,511 NZD
HK$50,600 HKD
As of November 1, 2026
Save $14,096 NZD (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $25,607 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5566372644. Listed at 11 retailers as of October 30, 2026, with prices from $11,511 to $25,607, a $14,096 spread on the same certified stone. NZ Jewellers lists it at $25,607. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 5566372644
Dimensions11.71 × 5.87 × 3.69 mm
L/W Ratio1.99
Girdle conditionMedium to Very Thick
Key to symbols
Crystal, Feather, Needle
Top View
11.71 mm5.87 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5566372644
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 62.8%

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: $25,607 NZD|Low: $11,420 NZD|High: $27,442 NZD|Avg: $16,295 NZD|-6.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8$11,511 NZD
Retailer 3$11,708 NZD
Retailer 10$12,370 NZD
Retailer 9$13,536 NZD
Retailer 4$14,528 NZD
Retailer 5$15,172 NZD
Retailer 7$15,311 NZD
Retailer 2$15,546 NZD
Retailer 6$21,337 NZD
NZ Jewellers$25,607 NZD

35 data points across 10 retailers

11 retailers$11,511 NZD to $25,607 NZD

A
Cheapest Retailer
-
$11,511 NZD
HK$50,600 HKD
A
Retailer 2
-
$11,708 NZD
₹627,397 INR
View
B+
Retailer 3
-
$12,370 NZD
$6,960 USD
View
Final sale: no returns
B+
Retailer 4
-
$13,536 NZD
$7,616 USD
View
Retailer 5
-
$13,560 NZD
SGD 10,310 SGD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$14,528 NZD
£6,436 GBP
View
B+
Retailer 7
-
$15,172 NZD
£6,722 GBP
View
B
Retailer 8
-
$15,311 NZD
$8,615 USD
View
B
Retailer 9
-
$15,546 NZD
$8,747 USD
View
B
Retailer 10
-
$21,337 NZD
£9,453 GBP
View
Most Expensive
B
NZ Jewellers
c46d6811-9a3a-4d37-b07f-f337090d5828 · Oct 30
$25,607 NZD
$14,408 USD
View
10 more retailers have this diamond
Prices start from $11,511 NZDSave up to $14,096 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
$11,511 NZD