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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 $799 NZD
As of November 6, 2026
Save $1,586 NZD (66%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $3,371 NZD 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: $1,198 NZD|Low: $799 NZD|High: $3,263 NZD|Avg: $1,621 NZD|-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$799 NZD
Retailer 9$952 NZD
Retailer 3$1,075 NZD
Retailer 1$1,198 NZD
Retailer 5$1,256 NZD
Retailer 7$1,295 NZD
Retailer 4$1,522 NZD
Retailer 6$2,385 NZD
Retailer 8$3,252 NZD

35 data points across 9 retailers

19 retailers$799 NZD to $2,385 NZD

A
Cheapest Retailer
-
$799 NZD
A
Retailer 2
-
$877 NZD
View
A
Retailer 3
-
$952 NZD
View
Final sale: no returns
Retailer 4
-
$1,034 NZD
View
Price last confirmed 12 days ago
Retailer 5
-
$1,075 NZD
View
Price last confirmed 46 days ago
A
Retailer 6
-
$1,075 NZD
View
Retailer 7
-
$1,113 NZD
View
Price last confirmed 13 days ago
Retailer 8
-
$1,113 NZD
View
Price last confirmed 13 days ago
Retailer 9
-
$1,192 NZD
View
Price last confirmed 15 days ago
A
Retailer 10
-
$1,198 NZD
View
Retailer 11
-
$1,241 NZD
View
Price last confirmed 46 days ago
B+
Retailer 12
-
$1,256 NZD
View
B+
Retailer 13
-
$1,270 NZD
View
B+
Retailer 14
-
$1,295 NZD
View
B+
Retailer 15
-
$1,522 NZD
View
B
Retailer 16
-
$2,385 NZD
View
Retailer 17
-
$3,243 NZD
View
Price last confirmed 14 days ago
Retailer 18
-
$3,252 NZD
View
Price last confirmed 11 days ago
Most Expensive
NZ Jewellers
ee36a515-ba75-4f10-b126-7fe2a8aa3ec7 · Sep 21
$3,371 NZD
$1,869 USD
View
Price last confirmed 46 days ago
18 more retailers have this diamond
Prices start from $799 NZDSave up to $1,586 NZD

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
$799 NZD