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Marquise|Natural|GIA

0.50ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 1555452594

Certificate GIA 1555452594

Diamond specifications and retailer prices

From $1,317 AUD
As of November 1, 2026
Save $1,250 AUD (49%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $3,858 AUD 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 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 1555452594. Listed at 25 retailers as of November 1, 2026, with a 95% 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
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555452594
Dimensions8.80 × 4.01 × 2.54 mm
L/W Ratio2.19
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Feather
Top View
8.80 mm4.01 mm0.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555452594
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.4%

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: $3,858 AUD|Low: $901 AUD|High: $3,858 AUD|Avg: $1,718 AUD
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
November 7, 2026
Retailer 17$1,256 AUD
Retailer 18$1,317 AUD
Retailer 20$1,323 AUD
Retailer 12$1,329 AUD
Retailer 9$1,402 AUD
Retailer 5$1,403 AUD
Retailer 24$1,407 AUD
Retailer 3$1,418 AUD
Retailer 4$1,434 AUD
Retailer 11$1,434 AUD
Retailer 22$1,489 AUD
Retailer 23$1,623 AUD
Retailer 19$1,652 AUD
Retailer 6$1,653 AUD
Retailer 14$1,746 AUD
Retailer 16$1,746 AUD
Retailer 7$1,783 AUD
Retailer 2$1,784 AUD
Retailer 15$1,805 AUD
Retailer 13$2,038 AUD
Retailer 10$2,061 AUD
Retailer 21$2,068 AUD
Retailer 8$2,567 AUD
NZ Jewellers$3,858 AUD

45 data points across 24 retailers

25 retailers$1,317 AUD to $2,567 AUD

Retailer 1
-
$949 AUD
Price last confirmed 64 days ago
B+
Retailer 2
-
$1,317 AUD
View
B+
Retailer 3
-
$1,323 AUD
View
Final sale: no returns
B+
Retailer 4
-
$1,329 AUD
View
B+
Retailer 5
-
$1,402 AUD
View
B+
Retailer 6
-
$1,403 AUD
View
B+
Retailer 7
-
$1,407 AUD
View
B+
Retailer 8
-
$1,418 AUD
View
B+
Retailer 9
-
$1,419 AUD
View
Retailer 10
-
$1,434 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$1,434 AUD
View
B+
Retailer 12
-
$1,489 AUD
View
B+
Retailer 13
-
$1,623 AUD
View
B
Retailer 14
-
$1,652 AUD
View
B+
Retailer 15
-
$1,653 AUD
View
B
Retailer 16
-
$1,746 AUD
View
B
Retailer 17
-
$1,746 AUD
View
B
Retailer 18
-
$1,783 AUD
View
B
Retailer 19
-
$1,784 AUD
View
B
Retailer 20
-
$1,805 AUD
View
B
Retailer 21
-
$2,038 AUD
View
B
Retailer 22
-
$2,061 AUD
View
Retailer 23
-
$2,068 AUD
View
Price last confirmed 33 days ago
B
Retailer 24
-
$2,567 AUD
View
Most Expensive
NZ Jewellers
f3be42e8-93e5-40cc-b751-f593e0ae7a41 · Nov 5
$3,858 AUD
$2,651 USD
View
Price under review
24 more retailers have this diamond
Prices start from $1,317 AUDSave up to $1,250 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.

B+
0.50ct Marquise
$1,317 AUD