Marquise|Natural|GIA

0.50ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 2554995250

Certificate GIA 2554995250

Diamond specifications and retailer prices

From $589 USD
HK$4,600 HKD
As of October 30, 2026
Save $1,023 USD (63%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,177 USD at NZ Jewellers · As of October 27, 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 H 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 2554995250. Listed at 19 retailers as of October 29, 2026, with a 174% 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
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2554995250
Dimensions8.03 × 4.05 × 2.62 mm
L/W Ratio1.98
Key to symbols
Feather, Crystal
Top View
8.03 mm4.05 mm0.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateGIA 2554995250
Side View
Table 57.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.6%

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: Oct 30
Current: $2,177 USD|Low: $563 USD|High: $2,177 USD|Avg: $915 USD|+3.6%
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
October 30, 2026
Retailer 3$589 USD
Retailer 6$640 USD
Retailer 17$694 USD
Retailer 19$694 USD
Retailer 7$700 USD
Retailer 18$721 USD
Retailer 10$722 USD
Retailer 5$801 USD
Retailer 16$801 USD
Retailer 8$811 USD
Retailer 9$826 USD
Retailer 12$855 USD
Retailer 13$857 USD
Retailer 4$875 USD
Retailer 15$986 USD
Retailer 2$1,071 USD
Retailer 11$1,080 USD
Retailer 14$1,612 USD
NZ Jewellers$2,177 USD

26 data points across 19 retailers

19 retailers$589 USD to $1,612 USD

A
Cheapest Retailer
-
$589 USD
HK$4,600 HKD
B+
Retailer 2
-
$694 USD
View
B+
Retailer 3
-
$694 USD
View
B+
Retailer 4
-
$700 USD
View
B+
Retailer 5
-
$721 USD
View
B+
Retailer 6
-
$722 USD
SGD 975 SGD
View
B+
Retailer 7
-
$801 USD
View
Retailer 8
-
$801 USD
View
Price last confirmed 14 days ago
B
Retailer 9
-
$811 USD
View
B
Retailer 10
-
$826 USD
View
B
Retailer 11
-
$855 USD
£673 GBP
View
B
Retailer 12
-
$857 USD
£675 GBP
View
B
Retailer 13
-
$875 USD
View
Retailer 14
-
$929 USD
£731 GBP
View
Price last confirmed 39 days ago
B
Retailer 15
-
$986 USD
€939 EUR
View
B
Retailer 16
-
$1,071 USD
ZAR 17,309 ZAR
View
Retailer 17
-
$1,080 USD
A$1,662 AUD
View
Price last confirmed 28 days ago
B
Retailer 18
-
$1,612 USD
£1,269 GBP
View
Most Expensive
NZ Jewellers
68b04a57-1884-4203-9656-3c71befe0aef · Oct 27
$2,177 USD
View
Price under review
18 more retailers have this diamond
Prices start from $589 USDSave up to $1,023 USD

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
$589 USD