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Marquise|Natural|GIA

0.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6555338540

Certificate GIA 6555338540

Diamond specifications and retailer prices

From $936 AUD
As of November 6, 2026
Save $1,406 AUD (60%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,186 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.5ct natural marquise diamond

This 0.5ct natural marquise sits in the half to three-quarter carat band, graded I 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 6555338540. Listed at 16 retailers as of November 4, 2026, with a 150% 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

0.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.34°
OriginNatural
Grading LabGIA
CertificateGIA 6555338540
Dimensions8.34 × 4.09 × 2.57 mm
L/W Ratio2.04
Culet sizeNone
Key to symbols
Feather
Top View
8.34 mm4.09 mm0.50 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555338540
Side View
Table 61.0%Crown 33.34°GirdlePavilionCulet: NoneDepth 62.8%

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 6
Current: $1,240 AUD|Low: $859 AUD|High: $2,372 AUD|Avg: $1,336 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9$936 AUD
Retailer 11$961 AUD
Retailer 2$1,055 AUD
Retailer 3$1,185 AUD
Retailer 4$1,208 AUD
Retailer 1$1,240 AUD
Retailer 5$1,241 AUD
Retailer 10$1,281 AUD
Retailer 8$1,438 AUD
Retailer 12$1,527 AUD
Retailer 6$1,567 AUD
Retailer 7$2,342 AUD

38 data points across 12 retailers

16 retailers$936 AUD to $2,342 AUD

B+
Cheapest Retailer
-
$936 AUD
Final sale: no returns
B+
Retailer 2
-
$961 AUD
View
Retailer 3
-
$1,016 AUD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$1,016 AUD
View
B+
Retailer 5
-
$1,055 AUD
View
B+
Retailer 6
-
$1,172 AUD
View
B
Retailer 7
-
$1,185 AUD
View
B
Retailer 8
-
$1,208 AUD
View
B
Retailer 9
-
$1,240 AUD
View
B
Retailer 10
-
$1,241 AUD
View
B
Retailer 11
-
$1,281 AUD
View
B
Retailer 12
-
$1,438 AUD
View
Retailer 13
-
$1,527 AUD
View
Price last confirmed 34 days ago
B
Retailer 14
-
$1,567 AUD
View
B
Retailer 15
-
$2,342 AUD
View
Most Expensive
NZ Jewellers
24905fea-0709-49c9-a767-e1aae4dd5287 · Nov 5
$3,186 AUD
$2,189 USD
View
Price under review
15 more retailers have this diamond
Prices start from $936 AUDSave up to $1,406 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+
0.50ct Marquise
$936 AUD