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Marquise|Natural|GIA

0.50ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 7551203000

Certificate GIA 7551203000

Diamond specifications and retailer prices

From £448 GBP
HK$4,700 HKD
As of November 1, 2026
Save £641 GBP (59%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,952 GBP at NZ Jewellers · As of September 20, 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 7551203000. Listed at 21 retailers as of November 1, 2026, with a 143% 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7551203000
Dimensions8.14 × 4.24 × 2.50 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Knot
Top View
8.14 mm4.24 mm0.50 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 7551203000
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.9%

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 1
Current: £451 GBP|Low: £426 GBP|High: £1,538 GBP|Avg: £794 GBP|-2.0%
Retailer 1
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
November 2, 2026
Retailer 13£448 GBP
Retailer 1£451 GBP
Retailer 12£531 GBP
Retailer 14£549 GBP
Retailer 2£604 GBP
Retailer 5£629 GBP
Retailer 4£694 GBP
Retailer 8£710 GBP
Retailer 15£719 GBP
Retailer 3£802 GBP
Retailer 10£842 GBP
Retailer 6£895 GBP
Retailer 11£918 GBP
Retailer 9£1,089 GBP
Retailer 7£1,457 GBP

33 data points across 15 retailers

21 retailers£448 GBP to £1,089 GBP

A
Cheapest Retailer
-
£448 GBP
HK$4,700 HKD
A
Retailer 2
-
£451 GBP
₹57,623 INR
View
A
Retailer 3
-
£531 GBP
$712 USD
View
A
Retailer 4
-
£549 GBP
$737 USD
View
Final sale: no returns
A
Retailer 5
-
£562 GBP
A$1,161 AUD
View
Retailer 6
-
£584 GBP
$784 USD
View
Price last confirmed 46 days ago
Retailer 7
-
£595 GBP
$798 USD
View
Price last confirmed 17 days ago
A
Retailer 8
-
£604 GBP
$810 USD
View
Retailer 9
-
£622 GBP
$835 USD
View
Price last confirmed 41 days ago
B+
Retailer 10
-
£629 GBP
SGD 1,140 SGD
View
B+
Retailer 11
-
£694 GBP
$931 USD
View
B+
Retailer 12
-
£710 GBP
View
Retailer 13
-
£718 GBP
$964 USD
View
Price last confirmed 41 days ago
B+
Retailer 14
-
£719 GBP
$965 USD
View
B+
Retailer 15
-
£802 GBP
$1,076 USD
View
B+
Retailer 16
-
£842 GBP
A$1,738 AUD
View
B+
Retailer 17
-
£842 GBP
€1,076 EUR
View
Retailer 18
-
£895 GBP
A$1,847 AUD
View
Price last confirmed 29 days ago
B+
Retailer 19
-
£918 GBP
ZAR 19,909 ZAR
View
B
Retailer 20
-
£1,089 GBP
View
Most Expensive
NZ Jewellers
4132ea8f-779b-4abd-90d9-002858131449 · Sep 20
£1,952 GBP
$2,620 USD
View
Price under review
20 more retailers have this diamond
Prices start from £448 GBPSave up to £641 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
£448 GBP