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Marquise|Natural|GIA

1.50ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 1555018794

Certificate GIA 1555018794

Diamond specifications and retailer prices

From $13,417 NZD
As of November 5, 2026
Save $4,984 NZD (27%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $24,266 NZD at MOH London · As of October 8, 2026
View at MOH London

About this 1.5ct natural marquise diamond

This 1.5ct 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 1555018794. Listed at 14 retailers as of November 5, 2026, with a 37% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.86°
Pavilion angle38.01°
OriginNatural
Grading LabGIA
CertificateGIA 1555018794
Dimensions11.54 × 6.02 × 3.54 mm
L/W Ratio1.92
Girdle conditionVery Thick
Key to symbols
Feather, Twinning Wisp, Cloud
Top View
11.54 mm6.02 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555018794
Side View
Table 60.0%Crown 35.86°Girdle: THK-VTKPavilion 38.01°Culet: NoneDepth 58.9%

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 5
Current: $24,266 NZD|Low: $12,573 NZD|High: $24,266 NZD|Avg: $16,875 NZD
MOH London
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 7, 2026
Retailer 13$13,506 NZD
Retailer 7$13,831 NZD
Retailer 4$14,170 NZD
Retailer 11$14,545 NZD
Retailer 3$15,371 NZD
Retailer 12$16,001 NZD
Retailer 2$16,933 NZD
Retailer 8$17,474 NZD
Retailer 6$17,815 NZD
Retailer 5$18,402 NZD
Retailer 9$18,991 NZD
Retailer 10$20,563 NZD
MOH London$24,266 NZD

42 data points across 13 retailers

14 retailers$13,417 NZD to $18,402 NZD

B+
Cheapest Retailer
-
$13,417 NZD
B
Retailer 2
-
$13,831 NZD
View
Final sale: no returns
B
Retailer 3
-
$13,886 NZD
View
B
Retailer 4
-
$14,170 NZD
View
Retailer 5
-
$14,426 NZD
View
Price last confirmed 30 days ago
B
Retailer 6
-
$16,001 NZD
View
B
Retailer 7
-
$16,572 NZD
View
B
Retailer 8
-
$16,933 NZD
View
B
Retailer 9
-
$17,474 NZD
View
B
Retailer 10
-
$17,815 NZD
View
Retailer 11
-
$18,032 NZD
View
Price last confirmed 62 days ago
B
Retailer 12
-
$18,402 NZD
View
Retailer 13
-
$18,991 NZD
View
Price last confirmed 30 days ago
Most Expensive
MOH London
452DDEF94 · Oct 8
$24,266 NZD
£10,592 GBP
View
Price last confirmed 29 days ago
13 more retailers have this diamond
Prices start from $13,417 NZDSave up to $4,984 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+
1.50ct Marquise
$13,417 NZD