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Marquise|Natural|GIA

0.50ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 1549578318

Certificate GIA 1549578318

Diamond specifications and retailer prices

From $1,709 NZD
$963 USD
As of November 1, 2026
Save $1,825 NZD (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $4,704 NZD at NZ Jewellers · As of October 30, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1549578318. Listed at 21 retailers as of November 1, 2026, with a 107% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1549578318
Dimensions7.66 × 4.21 × 2.61 mm
L/W Ratio1.82
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather
Top View
7.66 mm4.21 mm0.50 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1549578318
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 61.9%

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 1
Current: $4,704 NZD|Low: $1,712 NZD|High: $4,704 NZD|Avg: $2,586 NZD
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
November 2, 2026
Retailer 13$1,728 NZD
Retailer 3$1,748 NZD
Retailer 12$1,815 NZD
Retailer 9$1,964 NZD
Retailer 10$2,014 NZD
Retailer 5$2,174 NZD
Retailer 6$2,179 NZD
Retailer 2$2,500 NZD
Retailer 11$2,522 NZD
Retailer 8$2,977 NZD
Retailer 4$3,130 NZD
Retailer 7$3,533 NZD
NZ Jewellers$4,704 NZD

44 data points across 13 retailers

21 retailers$1,709 NZD to $3,533 NZD

B+
Cheapest Retailer
-
$1,709 NZD
$963 USD
B+
Retailer 2
-
$1,710 NZD
$964 USD
View
B+
Retailer 3
-
$1,728 NZD
$974 USD
View
B+
Retailer 4
-
$1,731 NZD
A$1,501 AUD
View
B+
Retailer 5
-
$1,748 NZD
$985 USD
View
B+
Retailer 6
-
$1,748 NZD
$985 USD
View
B+
Retailer 7
-
$1,815 NZD
$1,023 USD
View
B+
Retailer 8
-
$1,964 NZD
$1,107 USD
View
B
Retailer 9
-
$2,014 NZD
$1,135 USD
View
B+
Retailer 10
-
$2,016 NZD
$1,136 USD
View
B
Retailer 11
-
$2,129 NZD
$1,200 USD
View
B
Retailer 12
-
$2,129 NZD
$1,200 USD
View
B
Retailer 13
-
$2,174 NZD
$1,225 USD
View
B
Retailer 14
-
$2,179 NZD
£967 GBP
View
B
Retailer 15
-
$2,200 NZD
$1,240 USD
View
B
Retailer 16
-
$2,500 NZD
€1,342 EUR
View
Retailer 17
-
$2,522 NZD
A$2,187 AUD
View
Price last confirmed 28 days ago
B
Retailer 18
-
$2,977 NZD
ZAR 27,109 ZAR
View
B
Retailer 19
-
$3,130 NZD
CA$2,450 CAD
View
B
Retailer 20
-
$3,533 NZD
£1,568 GBP
View
Most Expensive
NZ Jewellers
fd89eb10-e512-4bea-bb36-f1c932654ce7 · Oct 30
$4,704 NZD
$2,651 USD
View
Price under review
20 more retailers have this diamond
Prices start from $1,709 NZDSave up to $1,825 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
$1,709 NZD