Marquise|Natural|GIA

0.50ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 2536185026

Certificate GIA 2536185026

Diamond specifications and retailer prices

From $643 USD
As of November 5, 2026
Save $839 USD (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $2,016 USD at NZ Jewellers · As of November 7, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2536185026. Listed at 19 retailers as of November 4, 2026, with a 130% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.50
Carat
I
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2536185026
Dimensions8.75 × 4.01 × 2.50 mm
L/W Ratio2.18
Top View
8.75 mm4.01 mm0.50 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2536185026
Side View
Table 55.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.4%

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 5
Current: $903 USD|Low: $650 USD|High: $1,502 USD|Avg: $927 USD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 2$650 USD
Retailer 8$668 USD
Retailer 4$726 USD
Retailer 7$783 USD
Retailer 6$789 USD
Retailer 11$830 USD
Retailer 5$877 USD
Retailer 1$903 USD
Retailer 10$940 USD
Retailer 3$966 USD
Retailer 9$1,482 USD

37 data points across 11 retailers

19 retailers$643 USD to $1,482 USD

B+
Cheapest Retailer
-
$643 USD
B+
Retailer 2
-
$650 USD
View
B+
Retailer 3
-
$668 USD
View
B+
Retailer 4
-
$692 USD
View
B+
Retailer 5
-
$692 USD
View
B+
Retailer 6
-
$726 USD
View
Retailer 7
-
$742 USD
View
Price last confirmed 61 days ago
B
Retailer 8
-
$742 USD
View
B
Retailer 9
-
$759 USD
View
B
Retailer 10
-
$774 USD
View
B
Retailer 11
-
$783 USD
View
B
Retailer 12
-
$789 USD
View
B
Retailer 13
-
$830 USD
View
B
Retailer 14
-
$877 USD
View
B
Retailer 15
-
$903 USD
View
B
Retailer 16
-
$940 USD
View
Retailer 17
-
$966 USD
View
Price last confirmed 33 days ago
B
Retailer 18
-
$1,482 USD
View
Most Expensive
NZ Jewellers
17f14358-a33c-4d3b-91f6-048f1987f085 · Nov 7
$2,016 USD
View
Price under review
18 more retailers have this diamond
Prices start from $643 USDSave up to $839 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