Marquise|Natural|GIA

0.50ct G SI1 Marquise Natural Diamond

ID • G/SI1 • GIA 2546697194

Certificate GIA 2546697194

Diamond specifications and retailer prices

From £647 GBP
$868 USD
As of November 2, 2026
Save £818 GBP (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,951 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2546697194. Listed at 20 retailers as of November 2, 2026, with a 126% 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
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.5°
Pavilion angle35.9°
OriginNatural
Grading LabGIA
CertificateGIA 2546697194
Dimensions8.16 × 4.09 × 2.59 mm
L/W Ratio2.00
Top View
8.16 mm4.09 mm0.50 ctG / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2546697194
Side View
Table 56.0%Crown 33.5°Girdle: MED-VTKPavilion 35.9°Culet: NoneDepth 63.4%

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 2
Current: £1,951 GBP|Low: £647 GBP|High: £1,951 GBP|Avg: £954 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
November 2, 2026
Retailer 9£647 GBP
Retailer 12£728 GBP
Retailer 7£730 GBP
Retailer 13£738 GBP
Retailer 4£766 GBP
Retailer 3£800 GBP
Retailer 16£800 GBP
Retailer 15£831 GBP
Retailer 6£900 GBP
Retailer 8£902 GBP
Retailer 17£923 GBP
Retailer 10£936 GBP
Retailer 5£1,015 GBP
Retailer 14£1,046 GBP
Retailer 11£1,235 GBP
Retailer 2£1,465 GBP
NZ Jewellers£1,951 GBP

44 data points across 17 retailers

20 retailers£647 GBP to £1,465 GBP

B+
Cheapest Retailer
-
£647 GBP
$868 USD
B+
Retailer 2
-
£728 GBP
SGD 1,320 SGD
View
B
Retailer 3
-
£730 GBP
$980 USD
View
B
Retailer 4
-
£738 GBP
$990 USD
View
Final sale: no returns
B+
Retailer 5
-
£766 GBP
$1,028 USD
View
B
Retailer 6
-
£800 GBP
$1,074 USD
View
Retailer 7
-
£800 GBP
$1,074 USD
View
Price last confirmed 35 days ago
B
Retailer 8
-
£800 GBP
$1,074 USD
View
B
Retailer 9
-
£831 GBP
$1,115 USD
View
B
Retailer 10
-
£900 GBP
$1,207 USD
View
B
Retailer 11
-
£902 GBP
$1,210 USD
View
B
Retailer 12
-
£923 GBP
$1,239 USD
View
Retailer 13
-
£923 GBP
$1,239 USD
View
Price last confirmed 35 days ago
B
Retailer 14
-
£936 GBP
View
B
Retailer 15
-
£1,015 GBP
$1,362 USD
View
Retailer 16
-
£1,046 GBP
A$2,160 AUD
View
Price last confirmed 30 days ago
B
Retailer 17
-
£1,235 GBP
ZAR 26,772 ZAR
View
B
Retailer 18
-
£1,465 GBP
View
Retailer 19
-
£1,951 GBP
$2,618 USD
View
Price under review
Most Expensive
NZ Jewellers
4f4d8d87-1edb-4f18-9494-850b760bb054 · Oct 30
£1,951 GBP
$2,618 USD
View
Price under review
19 more retailers have this diamond
Prices start from £647 GBPSave up to £818 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
£647 GBP