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Marquise|Natural|GIA

0.50ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 1558995545

Certificate GIA 1558995545

Diamond specifications and retailer prices

From $749 AUD
HK$4,100 HKD
As of November 1, 2026
Save $1,322 AUD (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,812 AUD at NZ Jewellers · As of November 3, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1558995545. Listed at 16 retailers as of November 1, 2026, with a 177% 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558995545
Dimensions7.71 × 4.16 × 2.59 mm
L/W Ratio1.85
Key to symbols
Cloud, Crystal, Feather
Top View
7.71 mm4.16 mm0.50 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558995545
Side View
Table 54.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 62.2%

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: $2,812 AUD|Low: $731 AUD|High: $2,812 AUD|Avg: $1,185 AUD|+3.2%
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
November 3, 2026
Retailer 4$749 AUD
Retailer 3$828 AUD
Retailer 12$896 AUD
Retailer 15$906 AUD
Retailer 7$934 AUD
Retailer 13$966 AUD
Retailer 14$966 AUD
Retailer 11$1,035 AUD
Retailer 8$1,071 AUD
Retailer 5$1,077 AUD
Retailer 6$1,085 AUD
Retailer 2$1,103 AUD
Retailer 10$1,320 AUD
Retailer 9$2,071 AUD
NZ Jewellers$2,812 AUD

31 data points across 15 retailers

16 retailers$749 AUD to $2,071 AUD

A
Cheapest Retailer
-
$749 AUD
HK$4,100 HKD
A
Retailer 2
-
$828 AUD
$580 USD
View
Final sale: no returns
A
Retailer 3
-
$896 AUD
$628 USD
View
B+
Retailer 4
-
$906 AUD
$635 USD
View
B+
Retailer 5
-
$934 AUD
SGD 885 SGD
View
B+
Retailer 6
-
$966 AUD
$677 USD
View
B+
Retailer 7
-
$966 AUD
$677 USD
View
B+
Retailer 8
-
$1,035 AUD
$725 USD
View
B+
Retailer 9
-
$1,071 AUD
£591 GBP
View
B+
Retailer 10
-
$1,077 AUD
$755 USD
View
B+
Retailer 11
-
$1,085 AUD
$760 USD
View
B+
Retailer 12
-
$1,103 AUD
£609 GBP
View
Retailer 13
-
$1,154 AUD
$809 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
$1,320 AUD
€881 EUR
View
B
Retailer 15
-
$2,071 AUD
£1,143 GBP
View
Most Expensive
NZ Jewellers
0baf91a4-6fc7-42cc-8403-433606648c27 · Nov 3
$2,812 AUD
$1,971 USD
View
Price under review
15 more retailers have this diamond
Prices start from $749 AUDSave up to $1,322 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
0.50ct Marquise
$749 AUD