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Marquise|Natural|GIA

0.90ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6551992390

Certificate GIA 6551992390

Diamond specifications and retailer prices

From $1,826 AUD
HK$10,000 HKD
As of November 1, 2026
Save $2,438 AUD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $5,936 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 0.9ct natural marquise diamond

This 0.9ct natural marquise sits in the just-under-one-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 6551992390. Listed at 19 retailers as of November 1, 2026, with a 133% 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

0.90
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551992390
Dimensions9.74 × 5.07 × 3.12 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather
Top View
9.74 mm5.07 mm0.90 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551992390
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 61.6%

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: $1,902 AUD|Low: $1,826 AUD|High: $4,333 AUD|Avg: $2,889 AUD|-2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 6$1,826 AUD
Retailer 1$1,902 AUD
Retailer 10$2,245 AUD
Retailer 9$2,258 AUD
Retailer 2$2,536 AUD
Retailer 11$2,629 AUD
Retailer 4$2,704 AUD
Retailer 3$3,189 AUD
Retailer 8$3,323 AUD
Retailer 7$3,589 AUD
Retailer 5$4,264 AUD

33 data points across 11 retailers

19 retailers$1,826 AUD to $4,264 AUD

A
Cheapest Retailer
-
$1,826 AUD
HK$10,000 HKD
A
Retailer 2
-
$1,902 AUD
₹126,923 INR
View
B+
Retailer 3
-
$2,245 AUD
$1,573 USD
View
Final sale: no returns
B+
Retailer 4
-
$2,258 AUD
SGD 2,138 SGD
View
B+
Retailer 5
-
$2,300 AUD
$1,612 USD
View
B+
Retailer 6
-
$2,304 AUD
$1,615 USD
View
B+
Retailer 7
-
$2,340 AUD
$1,640 USD
View
Retailer 8
-
$2,433 AUD
$1,705 USD
View
Price last confirmed 15 days ago
Retailer 9
-
$2,433 AUD
$1,705 USD
View
Price last confirmed 17 days ago
B
Retailer 10
-
$2,536 AUD
SGD 2,402 SGD
View
Retailer 11
-
$2,546 AUD
$1,784 USD
View
Price last confirmed 16 days ago
B+
Retailer 12
-
$2,629 AUD
$1,842 USD
View
B+
Retailer 13
-
$2,704 AUD
£1,492 GBP
View
Retailer 14
-
$2,808 AUD
$1,968 USD
View
Price last confirmed 14 days ago
Retailer 15
-
$3,189 AUD
View
Price last confirmed 27 days ago
B
Retailer 16
-
$3,323 AUD
€2,218 EUR
View
B
Retailer 17
-
$3,589 AUD
ZAR 40,636 ZAR
View
B
Retailer 18
-
$4,264 AUD
£2,353 GBP
View
Most Expensive
NZ Jewellers
5e747eff-1b15-4ef9-ac3c-25cc03d9706c · Oct 17
$5,936 AUD
$4,160 USD
View
Price last confirmed 15 days ago
18 more retailers have this diamond
Prices start from $1,826 AUDSave up to $2,438 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.

A
0.90ct Marquise
$1,826 AUD