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Marquise|Natural|GIA

1.51ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 6545855164

Certificate GIA 6545855164

Diamond specifications and retailer prices

From $10,344 NZD
$5,820 USD
As of November 1, 2026
Save $8,256 NZD (44%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $18,599 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 J 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 6545855164. Listed at 8 retailers as of October 30, 2026, with prices from $10,344 to $18,599, a $8,256 spread on the same certified stone. NZ Jewellers lists it at $18,599. 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle41.63°
Pavilion angle40.51°
OriginNatural
Grading LabGIA
CertificateGIA 6545855164
Dimensions10.29 × 5.82 × 4.01 mm
L/W Ratio1.77
Girdle conditionExtremely Thick
Key to symbols
Twinning Wisp, Feather, Crystal, Cavity, Needle, Indented Natural
Top View
10.29 mm5.82 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6545855164
Side View
Table 58.0%Crown 41.63°Girdle: Very ThickPavilion 40.51°Culet: NoneDepth 68.9%

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 1
Current: $18,599 NZD|Low: $8,842 NZD|High: $18,599 NZD|Avg: $11,295 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7$8,842 NZD
Retailer 9$9,798 NZD
Retailer 6$10,344 NZD
Retailer 3$10,699 NZD
Retailer 8$11,026 NZD
Retailer 2$11,121 NZD
Retailer 5$11,121 NZD
Retailer 10$11,499 NZD
Retailer 4$16,383 NZD
NZ Jewellers$18,599 NZD

8 data points across 10 retailers

8 retailers$10,344 NZD to $18,599 NZD

Retailer 1
-
$8,842 NZD
$4,975 USD
Price last confirmed 12 days ago
B+
Retailer 2
-
$10,344 NZD
$5,820 USD
View
B+
Retailer 3
-
$10,699 NZD
£4,740 GBP
View
Retailer 4
-
$11,026 NZD
$6,204 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
$11,121 NZD
$6,257 USD
View
B+
Retailer 6
-
$11,121 NZD
$6,257 USD
View
B
Retailer 7
-
$16,383 NZD
£7,258 GBP
View
Most Expensive
B
NZ Jewellers
0c44c79a-0461-465a-82d3-82391f0c0c93 · Oct 30
$18,599 NZD
$10,465 USD
View
7 more retailers have this diamond
Prices start from $10,344 NZDSave up to $8,256 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
$10,344 NZD