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Cushion|Natural|GIA

0.31ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6552406161

Certificate GIA 6552406161

Diamond specifications and retailer prices

From £339 GBP
SGD 614 SGD
As of October 31, 2026
Save £490 GBP (59%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £828 GBP at Queensmith · As of October 28, 2026
View at Queensmith

About this 0.31ct natural cushion diamond

This 0.31ct natural cushion sits in the sub-half-carat band, graded F 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 6552406161. Listed at 11 retailers as of October 28, 2026, with prices from £339 to £828, a £490 spread on the same certified stone. Queensmith lists it at £828. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552406161
Dimensions3.85 × 3.86 × 2.57 mm
L/W Ratio1.00
Top View
3.85 mm3.86 mm0.31 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552406161
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 66.7%

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: Oct 31
Current: £828 GBP|Low: £339 GBP|High: £853 GBP|Avg: £549 GBP|-1.1%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 8£339 GBP
Retailer 2£426 GBP
Retailer 7£440 GBP
Retailer 10£469 GBP
Retailer 9£472 GBP
Retailer 11£485 GBP
Retailer 5£518 GBP
Retailer 6£531 GBP
Retailer 3£584 GBP
Retailer 4£790 GBP
Queensmith£828 GBP

37 data points across 11 retailers

11 retailers£339 GBP to £828 GBP

A
Cheapest Retailer
-
£339 GBP
SGD 614 SGD
B+
Retailer 2
-
£426 GBP
View
B+
Retailer 3
-
£440 GBP
$590 USD
View
B+
Retailer 4
-
£469 GBP
View
B+
Retailer 5
-
£472 GBP
$633 USD
View
B+
Retailer 6
-
£485 GBP
$650 USD
View
B
Retailer 7
-
£518 GBP
€662 EUR
View
B
Retailer 8
-
£531 GBP
ZAR 11,502 ZAR
View
Retailer 9
-
£584 GBP
A$1,206 AUD
View
Price last confirmed 29 days ago
B
Retailer 10
-
£790 GBP
View
Most Expensive
B
Queensmith
6552406161 · Oct 28
£828 GBP
View
10 more retailers have this diamond
Prices start from £339 GBPSave up to £490 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
0.31ct Cushion
£339 GBP