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Marquise|Natural|GIA

0.31ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5563054546

Certificate GIA 5563054546

Diamond specifications and retailer prices

From £331 GBP
As of November 2, 2026
4 retailers carry this diamond
Most expensive: £331 GBP at 77 Diamonds
View at 77 Diamonds

About this 0.31ct natural marquise diamond

This 0.31ct natural marquise sits in the sub-half-carat band, graded I 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 5563054546. Listed at 4 retailers as of November 2, 2026. 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

0.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle36.17°
Pavilion angle40.09°
OriginNatural
Grading LabGIA
CertificateGIA 5563054546
Dimensions6.89 × 3.64 × 2.17 mm
L/W Ratio1.89
Culet sizeNone
Top View
6.89 mm3.64 mm0.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5563054546
Side View
Table 60.0%Crown 36.17°Girdle: MED-THKPavilion 40.09°Culet: NoneDepth 59.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £331 GBP|Low: £121 GBP|High: £344 GBP|Avg: £237 GBP|+36.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 10£121 GBP
Retailer 4£179 GBP
Retailer 9£187 GBP
Retailer 7£229 GBP
Retailer 2£239 GBP
Retailer 5£243 GBP
Retailer 6£256 GBP
Retailer 8£279 GBP
77 Diamonds£331 GBP
Retailer 3£344 GBP

27 data points across 10 retailers

4 retailers

Retailer 1
-
£179 GBP
$240 USD
Price last confirmed 32 days ago
Retailer 2
-
£187 GBP
SGD 340 SGD
View
Price last confirmed 32 days ago
Retailer 3
-
£279 GBP
$374 USD
View
Price last confirmed 32 days ago
Most Expensive
B
77 Diamonds
MQZFGQCMU8G · Nov 2
£331 GBP
View
3 more retailers have this diamond

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
0.31ct Marquise
£331 GBP