Marquise|Natural|GIA

0.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6555338540

Certificate GIA 6555338540

Diamond specifications and retailer prices

From $643 USD
As of November 6, 2026
Save $966 USD (60%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,189 USD 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 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 6555338540. Listed at 16 retailers as of November 4, 2026, with a 150% 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.34°
OriginNatural
Grading LabGIA
CertificateGIA 6555338540
Dimensions8.34 × 4.09 × 2.57 mm
L/W Ratio2.04
Culet sizeNone
Key to symbols
Feather
Top View
8.34 mm4.09 mm0.50 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555338540
Side View
Table 61.0%Crown 33.34°GirdlePavilionCulet: NoneDepth 62.8%

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 6
Current: $852 USD|Low: $590 USD|High: $1,630 USD|Avg: $918 USD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9$643 USD
Retailer 11$660 USD
Retailer 2$725 USD
Retailer 3$814 USD
Retailer 4$830 USD
Retailer 1$852 USD
Retailer 5$853 USD
Retailer 10$880 USD
Retailer 8$988 USD
Retailer 12$1,049 USD
Retailer 6$1,077 USD
Retailer 7$1,609 USD

38 data points across 12 retailers

16 retailers$643 USD to $1,609 USD

B+
Cheapest Retailer
-
$643 USD
Final sale: no returns
B+
Retailer 2
-
$660 USD
View
Retailer 3
-
$698 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$698 USD
View
B+
Retailer 5
-
$725 USD
View
B+
Retailer 6
-
$805 USD
View
B
Retailer 7
-
$814 USD
View
B
Retailer 8
-
$830 USD
View
B
Retailer 9
-
$852 USD
View
B
Retailer 10
-
$853 USD
View
B
Retailer 11
-
$880 USD
View
B
Retailer 12
-
$988 USD
View
Retailer 13
-
$1,049 USD
View
Price last confirmed 33 days ago
B
Retailer 14
-
$1,077 USD
View
B
Retailer 15
-
$1,609 USD
View
Most Expensive
NZ Jewellers
24905fea-0709-49c9-a767-e1aae4dd5287 · Nov 5
$2,189 USD
View
Price under review
15 more retailers have this diamond
Prices start from $643 USDSave up to $966 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.

B+
0.50ct Marquise
$643 USD