Marquise|Natural|GIA

0.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6555094150

Certificate GIA 6555094150

Diamond specifications and retailer prices

From $496 USD
As of November 6, 2026
Save $1,214 USD (71%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,029 USD at MOH London · As of November 2, 2026
View at MOH London

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 6555094150. Listed at 15 retailers as of November 5, 2026, with a 245% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555094150
Dimensions7.74 × 4.17 × 2.63 mm
L/W Ratio1.86
Top View
7.74 mm4.17 mm0.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555094150
Side View
Table 64.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.1%

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 6
Current: $2,029 USD|Low: $470 USD|High: $2,029 USD|Avg: $897 USD
MOH London
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
November 6, 2026
Retailer 2$496 USD
Retailer 6$778 USD
Retailer 7$898 USD
Retailer 8$988 USD
Retailer 4$989 USD
Retailer 10$1,023 USD
Retailer 13$1,108 USD
Retailer 3$1,201 USD
Retailer 14$1,245 USD
Retailer 5$1,279 USD
Retailer 11$1,360 USD
Retailer 12$1,419 USD
Retailer 9$1,710 USD
MOH London$2,029 USD

42 data points across 14 retailers

15 retailers$496 USD to $1,710 USD

A
Cheapest Retailer
-
$496 USD
A
Retailer 2
-
$600 USD
View
B+
Retailer 3
-
$778 USD
View
B+
Retailer 4
-
$898 USD
View
B
Retailer 5
-
$988 USD
View
B
Retailer 6
-
$989 USD
View
B
Retailer 7
-
$1,023 USD
View
Final sale: no returns
B
Retailer 8
-
$1,108 USD
View
B
Retailer 9
-
$1,201 USD
View
B
Retailer 10
-
$1,245 USD
View
B
Retailer 11
-
$1,279 USD
View
B
Retailer 12
-
$1,360 USD
View
B
Retailer 13
-
$1,419 USD
View
C
Retailer 14
-
$1,710 USD
View
Most Expensive
MOH London
14E2BB29A · Nov 2
$2,029 USD
£1,598 GBP
View
Price under review
14 more retailers have this diamond
Prices start from $496 USDSave up to $1,214 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
$496 USD