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Marquise|Natural|GIA

0.50ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 1549682009

Certificate GIA 1549682009

Diamond specifications and retailer prices

From £334 GBP
As of November 6, 2026
Save £1,024 GBP (75%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,357 GBP 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1549682009. Listed at 20 retailers as of November 5, 2026, with prices from £334 to £1,357, a £1,024 spread on the same certified stone. NZ Jewellers lists it at £1,357. 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
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1549682009
Dimensions7.82 × 4.20 × 2.67 mm
L/W Ratio1.86
Girdle conditionFaceted
Key to symbols
Feather, Twinning Wisp
Top View
7.82 mm4.20 mm0.50 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateGIA 1549682009
Side View
Table 58.0%CrownGirdle: MED-VTKPavilionCulet: NDepth 63.7%

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: £1,357 GBP|Low: £334 GBP|High: £1,357 GBP|Avg: £573 GBP
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 2£334 GBP
Retailer 10£363 GBP
Retailer 7£399 GBP
Retailer 11£413 GBP
Retailer 19£433 GBP
Retailer 13£451 GBP
Retailer 3£466 GBP
Retailer 9£466 GBP
Retailer 18£499 GBP
Retailer 14£525 GBP
Retailer 12£528 GBP
Retailer 5£530 GBP
Retailer 6£538 GBP
Retailer 4£579 GBP
Retailer 8£616 GBP
Retailer 16£638 GBP
Retailer 17£668 GBP
Retailer 15£998 GBP
NZ Jewellers£1,357 GBP

25 data points across 19 retailers

20 retailers£334 GBP to £1,357 GBP

A
Cheapest Retailer
-
£334 GBP
B+
Retailer 2
-
£363 GBP
View
B+
Retailer 3
-
£399 GBP
View
Final sale: no returns
B+
Retailer 4
-
£413 GBP
View
B+
Retailer 5
-
£433 GBP
View
B+
Retailer 6
-
£451 GBP
View
B+
Retailer 7
-
£466 GBP
View
Retailer 8
-
£466 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£499 GBP
View
B+
Retailer 10
-
£525 GBP
View
B+
Retailer 11
-
£528 GBP
View
B
Retailer 12
-
£530 GBP
View
B
Retailer 13
-
£538 GBP
View
B
Retailer 14
-
£579 GBP
View
B
Retailer 15
-
£616 GBP
View
B
Retailer 16
-
£638 GBP
View
Retailer 17
-
£662 GBP
View
Price last confirmed 33 days ago
B
Retailer 18
-
£668 GBP
View
C
Retailer 19
-
£998 GBP
View
Most Expensive
C
NZ Jewellers
05c9ab7c-8dce-4b8e-9624-ce5d7109f7a1 · Nov 5
£1,357 GBP
$1,817 USD
View
19 more retailers have this diamond
Prices start from £334 GBPSave up to £1,024 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
£334 GBP