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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 $1,160 NZD
As of November 6, 2026
Save $1,743 NZD (60%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $3,949 NZD 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: $1,537 NZD|Low: $1,064 NZD|High: $2,940 NZD|Avg: $1,656 NZD|-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$1,160 NZD
Retailer 11$1,191 NZD
Retailer 2$1,308 NZD
Retailer 3$1,468 NZD
Retailer 4$1,497 NZD
Retailer 1$1,537 NZD
Retailer 5$1,539 NZD
Retailer 10$1,587 NZD
Retailer 8$1,782 NZD
Retailer 12$1,892 NZD
Retailer 6$1,943 NZD
Retailer 7$2,902 NZD

38 data points across 12 retailers

16 retailers$1,160 NZD to $2,902 NZD

B+
Cheapest Retailer
-
$1,160 NZD
Final sale: no returns
B+
Retailer 2
-
$1,191 NZD
View
Retailer 3
-
$1,259 NZD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$1,259 NZD
View
B+
Retailer 5
-
$1,308 NZD
View
B+
Retailer 6
-
$1,452 NZD
View
B
Retailer 7
-
$1,468 NZD
View
B
Retailer 8
-
$1,497 NZD
View
B
Retailer 9
-
$1,537 NZD
View
B
Retailer 10
-
$1,539 NZD
View
B
Retailer 11
-
$1,587 NZD
View
B
Retailer 12
-
$1,782 NZD
View
Retailer 13
-
$1,892 NZD
View
Price last confirmed 34 days ago
B
Retailer 14
-
$1,943 NZD
View
B
Retailer 15
-
$2,902 NZD
View
Most Expensive
NZ Jewellers
24905fea-0709-49c9-a767-e1aae4dd5287 · Nov 5
$3,949 NZD
$2,189 USD
View
Price under review
15 more retailers have this diamond
Prices start from $1,160 NZDSave up to $1,743 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.

B+
0.50ct Marquise
$1,160 NZD