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Marquise|Natural|GIA

0.50ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 1549578318

Certificate GIA 1549578318

Diamond specifications and retailer prices

From £718 GBP
$963 USD
As of November 1, 2026
Save £766 GBP (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,975 GBP at NZ Jewellers · As of October 30, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1549578318. Listed at 21 retailers as of November 1, 2026, with a 107% 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1549578318
Dimensions7.66 × 4.21 × 2.61 mm
L/W Ratio1.82
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather
Top View
7.66 mm4.21 mm0.50 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1549578318
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 61.9%

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 1
Current: £1,975 GBP|Low: £719 GBP|High: £1,975 GBP|Avg: £1,086 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
November 2, 2026
Retailer 13£726 GBP
Retailer 3£734 GBP
Retailer 12£762 GBP
Retailer 9£825 GBP
Retailer 10£846 GBP
Retailer 5£913 GBP
Retailer 6£915 GBP
Retailer 2£1,050 GBP
Retailer 11£1,059 GBP
Retailer 8£1,250 GBP
Retailer 4£1,315 GBP
Retailer 7£1,484 GBP
NZ Jewellers£1,975 GBP

44 data points across 13 retailers

21 retailers£718 GBP to £1,484 GBP

B+
Cheapest Retailer
-
£718 GBP
$963 USD
B+
Retailer 2
-
£718 GBP
$964 USD
View
B+
Retailer 3
-
£726 GBP
$974 USD
View
B+
Retailer 4
-
£727 GBP
A$1,501 AUD
View
B+
Retailer 5
-
£734 GBP
$985 USD
View
B+
Retailer 6
-
£734 GBP
$985 USD
View
B+
Retailer 7
-
£762 GBP
$1,023 USD
View
B+
Retailer 8
-
£825 GBP
$1,107 USD
View
B
Retailer 9
-
£846 GBP
$1,135 USD
View
B+
Retailer 10
-
£847 GBP
$1,136 USD
View
B
Retailer 11
-
£894 GBP
$1,200 USD
View
B
Retailer 12
-
£894 GBP
$1,200 USD
View
B
Retailer 13
-
£913 GBP
$1,225 USD
View
B
Retailer 14
-
£915 GBP
View
B
Retailer 15
-
£924 GBP
$1,240 USD
View
B
Retailer 16
-
£1,050 GBP
€1,342 EUR
View
Retailer 17
-
£1,059 GBP
A$2,187 AUD
View
Price last confirmed 28 days ago
B
Retailer 18
-
£1,250 GBP
ZAR 27,109 ZAR
View
B
Retailer 19
-
£1,315 GBP
CA$2,450 CAD
View
B
Retailer 20
-
£1,484 GBP
View
Most Expensive
NZ Jewellers
fd89eb10-e512-4bea-bb36-f1c932654ce7 · Oct 30
£1,975 GBP
$2,651 USD
View
Price under review
20 more retailers have this diamond
Prices start from £718 GBPSave up to £766 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.

B+
0.50ct Marquise
£718 GBP