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Round|Natural|GIA

0.65ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 3565131209

Certificate GIA 3565131209

Diamond specifications and retailer prices

From £601 GBP
HK$6,300 HKD
As of November 1, 2026
Save £1,263 GBP (68%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,937 GBP at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 0.65ct natural round diamond

This 0.65ct natural round sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3565131209. Listed at 21 retailers as of October 28, 2026, with a 210% 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

0.65
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 3565131209
Dimensions5.55 × 5.51 × 3.42 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
5.55 mm5.51 mm0.65 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3565131209
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

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: £932 GBP|Low: £601 GBP|High: £1,869 GBP|Avg: £1,057 GBP|+3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7£601 GBP
Retailer 4£622 GBP
Retailer 2£733 GBP
Retailer 11£805 GBP
Retailer 10£898 GBP
Retailer 1£932 GBP
Retailer 3£1,039 GBP
Retailer 5£1,109 GBP
Retailer 8£1,186 GBP
Retailer 6£1,455 GBP
Retailer 9£1,864 GBP

31 data points across 11 retailers

21 retailers£601 GBP to £1,864 GBP

A
Cheapest Retailer
-
£601 GBP
HK$6,300 HKD
A
Retailer 2
-
£622 GBP
₹79,483 INR
View
A
Retailer 3
-
£733 GBP
$983 USD
View
Final sale: no returns
B+
Retailer 4
-
£738 GBP
$990 USD
View
Retailer 5
-
£750 GBP
$1,007 USD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
£778 GBP
$1,044 USD
View
Retailer 7
-
£794 GBP
$1,066 USD
View
Price last confirmed 18 days ago
Retailer 8
-
£794 GBP
$1,066 USD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
£805 GBP
SGD 1,460 SGD
View
Retailer 10
-
£825 GBP
$1,107 USD
View
Price last confirmed 18 days ago
B+
Retailer 11
-
£830 GBP
SGD 1,505 SGD
View
B+
Retailer 12
-
£894 GBP
$1,200 USD
View
B+
Retailer 13
-
£898 GBP
$1,205 USD
View
Retailer 14
-
£917 GBP
$1,230 USD
View
Price last confirmed 15 days ago
B+
Retailer 15
-
£932 GBP
View
Retailer 16
-
£1,039 GBP
A$2,144 AUD
View
Price last confirmed 29 days ago
B+
Retailer 17
-
£1,109 GBP
€1,417 EUR
View
B+
Retailer 18
-
£1,186 GBP
ZAR 25,715 ZAR
View
B
Retailer 19
-
£1,455 GBP
View
B
Retailer 20
-
£1,864 GBP
View
Most Expensive
NZ Jewellers
f57dc3e5-4c53-4dcd-91a2-8f1da97c217f · Oct 17
£1,937 GBP
$2,600 USD
View
Price last confirmed 16 days ago
20 more retailers have this diamond
Prices start from £601 GBPSave up to £1,263 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
0.65ct Round
£601 GBP