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Marquise|Natural|GIA

0.50ct G SI2 Marquise Natural Diamond

VG • G/SI2 • GIA 1558178635

Certificate GIA 1558178635

Diamond specifications and retailer prices

From $645 AUD
As of November 6, 2026
Save $1,279 AUD (66%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,720 AUD at NZ Jewellers · As of September 21, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1558178635. Listed at 19 retailers as of November 4, 2026, with a 198% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.50
Carat
G
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558178635
Dimensions8.39 × 4.20 × 2.38 mm
L/W Ratio2.00
Key to symbols
Twinning Wisp, Feather
Top View
8.39 mm4.20 mm0.50 ctG / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558178635
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 56.7%

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 6
Current: $966 AUD|Low: $645 AUD|High: $2,633 AUD|Avg: $1,308 AUD|-4.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2$645 AUD
Retailer 9$768 AUD
Retailer 3$867 AUD
Retailer 1$966 AUD
Retailer 5$1,013 AUD
Retailer 7$1,045 AUD
Retailer 4$1,228 AUD
Retailer 6$1,924 AUD
Retailer 8$2,624 AUD

35 data points across 9 retailers

19 retailers$645 AUD to $1,924 AUD

A
Cheapest Retailer
-
$645 AUD
A
Retailer 2
-
$707 AUD
View
A
Retailer 3
-
$768 AUD
View
Final sale: no returns
Retailer 4
-
$834 AUD
View
Price last confirmed 11 days ago
Retailer 5
-
$867 AUD
View
Price last confirmed 45 days ago
A
Retailer 6
-
$867 AUD
View
Retailer 7
-
$898 AUD
View
Price last confirmed 12 days ago
Retailer 8
-
$898 AUD
View
Price last confirmed 12 days ago
Retailer 9
-
$962 AUD
View
Price last confirmed 14 days ago
A
Retailer 10
-
$966 AUD
View
Retailer 11
-
$1,001 AUD
View
Price last confirmed 45 days ago
B+
Retailer 12
-
$1,013 AUD
View
B+
Retailer 13
-
$1,025 AUD
View
B+
Retailer 14
-
$1,045 AUD
View
B+
Retailer 15
-
$1,228 AUD
View
B
Retailer 16
-
$1,924 AUD
View
Retailer 17
-
$2,617 AUD
View
Price last confirmed 13 days ago
Retailer 18
-
$2,624 AUD
View
Price last confirmed 10 days ago
Most Expensive
NZ Jewellers
ee36a515-ba75-4f10-b126-7fe2a8aa3ec7 · Sep 21
$2,720 AUD
$1,869 USD
View
Price last confirmed 46 days ago
18 more retailers have this diamond
Prices start from $645 AUDSave up to $1,279 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
$645 AUD