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Round|Natural|GIA

0.65ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2557581317

Certificate GIA 2557581317

Diamond specifications and retailer prices

From £506 GBP
HK$5,300 HKD
As of November 1, 2026
Save £739 GBP (59%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £2,098 GBP at NZ Jewellers · As of September 28, 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 2557581317. Listed at 21 retailers as of November 1, 2026, with a 146% 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
FluorescenceMedium
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557581317
Dimensions5.53 × 5.56 × 3.46 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
5.53 mm5.56 mm0.65 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557581317
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £2,010 GBP|Low: £467 GBP|High: £2,078 GBP|Avg: £860 GBP|-3.3%
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
Retailer 18
November 2, 2026
Retailer 14£506 GBP
Retailer 12£522 GBP
Retailer 3£536 GBP
Retailer 6£559 GBP
Retailer 11£589 GBP
Retailer 8£604 GBP
Retailer 13£616 GBP
Retailer 18£623 GBP
Retailer 9£660 GBP
Retailer 2£685 GBP
Retailer 4£715 GBP
Retailer 16£741 GBP
Retailer 10£877 GBP
Retailer 7£960 GBP
Retailer 5£971 GBP
Retailer 17£1,174 GBP
Retailer 15£1,244 GBP
NZ Jewellers£2,010 GBP

26 data points across 18 retailers

21 retailers£506 GBP to £1,244 GBP

A
Cheapest Retailer
-
£506 GBP
HK$5,300 HKD
A
Retailer 2
-
£522 GBP
$700 USD
View
A
Retailer 3
-
£536 GBP
$719 USD
View
Final sale: no returns
A
Retailer 4
-
£559 GBP
$750 USD
View
A
Retailer 5
-
£589 GBP
$791 USD
View
Retailer 6
-
£604 GBP
$810 USD
View
Price last confirmed 11 days ago
A
Retailer 7
-
£616 GBP
A$1,271 AUD
View
A
Retailer 8
-
£623 GBP
€796 EUR
View
Retailer 9
-
£660 GBP
SGD 1,197 SGD
View
Price last confirmed 10 days ago
A
Retailer 10
-
£685 GBP
View
A
Retailer 11
-
£715 GBP
$960 USD
View
A
Retailer 12
-
£741 GBP
$994 USD
View
B+
Retailer 13
-
£827 GBP
A$1,708 AUD
View
Retailer 14
-
£960 GBP
$1,288 USD
View
Price last confirmed 7 days ago
B+
Retailer 15
-
£971 GBP
ZAR 21,053 ZAR
View
Retailer 16
-
£997 GBP
A$2,058 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
£1,174 GBP
View
B
Retailer 18
-
£1,244 GBP
$1,670 USD
View
Retailer 19
-
£2,007 GBP
$2,693 USD
View
Price last confirmed 52 days ago
Retailer 20
-
£2,010 GBP
$2,697 USD
View
Price last confirmed 10 days ago
Most Expensive
NZ Jewellers
2642d381-e9c3-4b06-98d3-de2bed1e91f8 · Sep 28
£2,098 GBP
$2,816 USD
View
Price last confirmed 35 days ago
20 more retailers have this diamond
Prices start from £506 GBPSave up to £739 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
£506 GBP