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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

ID • G/SI1 • GIA 7558057424

Certificate GIA 7558057424

Diamond specifications and retailer prices

From $18,289 NZD
$10,291 USD
As of November 2, 2026
Save $12,188 NZD (40%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $30,477 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 G 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 7558057424. Listed at 9 retailers as of October 30, 2026, with prices from $18,289 to $30,477, a $12,188 spread on the same certified stone. NZ Jewellers lists it at $30,477. 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
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 7558057424
Dimensions11.57 × 6.01 × 3.63 mm
L/W Ratio1.93
Girdle conditionFaceted
Culet sizeNone
Top View
11.57 mm6.01 mm1.51 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7558057424
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 60.4%

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: $30,477 NZD|Low: $18,289 NZD|High: $31,586 NZD|Avg: $23,893 NZD|-3.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 8$18,289 NZD
Retailer 4$19,591 NZD
Retailer 7$20,391 NZD
Retailer 2$20,604 NZD
Retailer 9$20,790 NZD
Retailer 3$21,450 NZD
Retailer 6$26,865 NZD
Retailer 5$28,560 NZD
NZ Jewellers$30,477 NZD

33 data points across 9 retailers

9 retailers$18,289 NZD to $30,477 NZD

B+
Cheapest Retailer
-
$18,289 NZD
$10,291 USD
B+
Retailer 2
-
$19,591 NZD
£8,680 GBP
View
B+
Retailer 3
-
$20,391 NZD
$11,473 USD
View
B+
Retailer 4
-
$20,604 NZD
£9,128 GBP
View
Retailer 5
-
$20,790 NZD
A$17,996 AUD
View
Price last confirmed 29 days ago
B+
Retailer 6
-
$21,450 NZD
€11,494 EUR
View
B
Retailer 7
-
$26,865 NZD
ZAR 244,196 ZAR
View
B
Retailer 8
-
$28,560 NZD
£12,653 GBP
View
Most Expensive
B
NZ Jewellers
74e0fd8e-56f3-488c-8aa1-41bcb4223ae2 · Oct 30
$30,477 NZD
$17,148 USD
View
8 more retailers have this diamond
Prices start from $18,289 NZDSave up to $12,188 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
$18,289 NZD