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Marquise|Natural|GIA

1.50ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 7553879339

Certificate GIA 7553879339

Diamond specifications and retailer prices

From $9,806 AUD
As of November 2, 2026
Save $6,843 AUD (41%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $19,981 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 7553879339. Listed at 19 retailers as of November 2, 2026, with a 70% 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
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7553879339
Dimensions11.02 × 6.11 × 4.00 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal
Top View
11.02 mm6.11 mm1.50 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7553879339
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 65.5%

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: $19,981 AUD|Low: $8,610 AUD|High: $19,981 AUD|Avg: $11,334 AUD|+17.4%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 3, 2026
Retailer 11$9,393 AUD
Retailer 8$9,395 AUD
Retailer 10$9,635 AUD
Retailer 19$9,806 AUD
Retailer 4$9,809 AUD
Retailer 14$9,980 AUD
Retailer 17$10,029 AUD
Retailer 3$10,034 AUD
Retailer 9$10,178 AUD
Retailer 12$10,275 AUD
Retailer 6$10,333 AUD
Retailer 18$10,354 AUD
Retailer 13$11,150 AUD
Retailer 2$11,384 AUD
Retailer 21$11,547 AUD
Retailer 7$11,742 AUD
Retailer 20$12,166 AUD
Retailer 5$12,353 AUD
Retailer 15$12,471 AUD
Retailer 16$16,650 AUD
NZ Jewellers$19,981 AUD

30 data points across 21 retailers

19 retailers$9,806 AUD to $16,650 AUD

Retailer 1
-
$9,395 AUD
Price last confirmed 21 days ago
Retailer 2
-
$9,635 AUD
View
Price last confirmed 15 days ago
B+
Retailer 3
-
$9,806 AUD
View
Retailer 4
-
$9,980 AUD
View
Price last confirmed 33 days ago
B
Retailer 5
-
$10,029 AUD
View
B
Retailer 6
-
$10,034 AUD
View
Retailer 7
-
$10,178 AUD
View
Price last confirmed 17 days ago
Retailer 8
-
$10,275 AUD
View
Price last confirmed 11 days ago
Retailer 9
-
$10,333 AUD
View
Price last confirmed 21 days ago
B
Retailer 10
-
$10,354 AUD
View
B
Retailer 11
-
$11,150 AUD
View
B
Retailer 12
-
$11,384 AUD
View
B
Retailer 13
-
$11,547 AUD
View
Retailer 14
-
$11,742 AUD
View
Price last confirmed 16 days ago
B
Retailer 15
-
$12,166 AUD
View
Retailer 16
-
$12,353 AUD
View
Price last confirmed 20 days ago
B
Retailer 17
-
$12,471 AUD
View
B
Retailer 18
-
$16,650 AUD
View
Most Expensive
NZ Jewellers
1bad364c-c989-4b2b-9b91-ec43e7907c46 · Oct 30
$19,981 AUD
$13,729 USD
View
Price last confirmed 7 days ago
18 more retailers have this diamond
Prices start from $9,806 AUDSave up to $6,843 AUD

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
$9,806 AUD