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Marquise|Natural|GIA

0.50ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2556716912

Certificate GIA 2556716912

Diamond specifications and retailer prices

From £308 GBP
₹39,302 INR
As of November 2, 2026
Save £646 GBP (68%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,296 GBP at NZ Jewellers · As of October 3, 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 2556716912. Listed at 17 retailers as of November 2, 2026, with a 210% 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556716912
Dimensions7.93 × 4.17 × 2.67 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
7.93 mm4.17 mm0.50 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556716912
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 64.2%

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 2
Current: £308 GBP|Low: £262 GBP|High: £982 GBP|Avg: £476 GBP|-3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 1£308 GBP
Retailer 9£353 GBP
Retailer 2£354 GBP
Retailer 8£381 GBP
Retailer 7£411 GBP
Retailer 10£435 GBP
Retailer 3£494 GBP
Retailer 4£511 GBP
Retailer 6£575 GBP
Retailer 5£954 GBP

31 data points across 10 retailers

17 retailers£308 GBP to £954 GBP

A
Cheapest Retailer
-
£308 GBP
₹39,302 INR
A
Retailer 2
-
£353 GBP
HK$3,700 HKD
View
A
Retailer 3
-
£354 GBP
$475 USD
View
A
Retailer 4
-
£381 GBP
$511 USD
View
Final sale: no returns
Retailer 5
-
£410 GBP
$550 USD
View
Price last confirmed 41 days ago
A
Retailer 6
-
£411 GBP
SGD 745 SGD
View
Retailer 7
-
£414 GBP
$555 USD
View
Price last confirmed 25 days ago
Retailer 8
-
£435 GBP
SGD 788 SGD
View
Price last confirmed 7 days ago
Retailer 9
-
£453 GBP
$608 USD
View
Price last confirmed 32 days ago
Retailer 10
-
£472 GBP
$634 USD
View
Price last confirmed 41 days ago
Retailer 11
-
£477 GBP
$640 USD
View
Price last confirmed 24 days ago
B+
Retailer 12
-
£494 GBP
View
B+
Retailer 13
-
£511 GBP
View
B+
Retailer 14
-
£575 GBP
$772 USD
View
B
Retailer 15
-
£954 GBP
View
Retailer 16
-
£1,285 GBP
$1,724 USD
View
Price last confirmed 42 days ago
Most Expensive
NZ Jewellers
c39abb66-5349-4569-9cd2-eb196732ba02 · Oct 3
£1,296 GBP
$1,739 USD
View
Price last confirmed 30 days ago
16 more retailers have this diamond
Prices start from £308 GBPSave up to £646 GBP

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
£308 GBP