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Marquise|Natural|GIA

0.50ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 1558995545

Certificate GIA 1558995545

Diamond specifications and retailer prices

From $525 USD
HK$4,100 HKD
As of November 1, 2026
Save $927 USD (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,971 USD 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1558995545. Listed at 16 retailers as of November 1, 2026, with a 177% 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
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558995545
Dimensions7.71 × 4.16 × 2.59 mm
L/W Ratio1.85
Key to symbols
Cloud, Crystal, Feather
Top View
7.71 mm4.16 mm0.50 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1558995545
Side View
Table 54.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 62.2%

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 1
Current: $1,971 USD|Low: $512 USD|High: $1,971 USD|Avg: $831 USD|+3.2%
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
November 2, 2026
Retailer 4$525 USD
Retailer 3$580 USD
Retailer 12$628 USD
Retailer 15$635 USD
Retailer 7$655 USD
Retailer 13$677 USD
Retailer 14$677 USD
Retailer 11$725 USD
Retailer 2$751 USD
Retailer 5$755 USD
Retailer 6$760 USD
Retailer 8$773 USD
Retailer 10$925 USD
Retailer 9$1,452 USD
NZ Jewellers$1,971 USD

31 data points across 15 retailers

16 retailers$525 USD to $1,452 USD

A
Cheapest Retailer
-
$525 USD
HK$4,100 HKD
A
Retailer 2
-
$580 USD
View
Final sale: no returns
A
Retailer 3
-
$628 USD
View
B+
Retailer 4
-
$635 USD
View
B+
Retailer 5
-
$655 USD
SGD 885 SGD
View
B+
Retailer 6
-
$677 USD
View
B+
Retailer 7
-
$677 USD
View
B+
Retailer 8
-
$725 USD
View
B+
Retailer 9
-
$751 USD
£591 GBP
View
B+
Retailer 10
-
$755 USD
View
B+
Retailer 11
-
$760 USD
View
B+
Retailer 12
-
$773 USD
£609 GBP
View
Retailer 13
-
$809 USD
View
Price last confirmed 14 days ago
B
Retailer 14
-
$925 USD
€881 EUR
View
B
Retailer 15
-
$1,452 USD
£1,143 GBP
View
Most Expensive
NZ Jewellers
0baf91a4-6fc7-42cc-8403-433606648c27 · Oct 30
$1,971 USD
View
Price under review
15 more retailers have this diamond
Prices start from $525 USDSave up to $927 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
$525 USD