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Round|Natural|GIA

0.65ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 1559817085

Certificate GIA 1559817085

Diamond specifications and retailer prices

From £762 GBP
$1,021 USD
As of October 28, 2026
Save £546 GBP (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,308 GBP at Cape Diamonds · As of October 26, 2026
View at Cape Diamonds

About this 0.65ct natural round diamond

This 0.65ct natural round 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 and certified by GIA 1559817085. Listed at 13 retailers as of October 26, 2026, with prices from £762 to £1,308, a £546 spread on the same certified stone. Cape Diamonds lists it at £1,308. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1559817085
Dimensions5.66 × 5.69 × 3.37 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
5.66 mm5.69 mm0.65 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559817085
Side View
Table 61.0%Crown 32.5°Girdle: MED-MEDPavilion 41.4°Culet: NoneDepth 59.3%

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 28
Current: £1,308 GBP|Low: £762 GBP|High: £1,314 GBP|Avg: £1,013 GBP|+2.4%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 28, 2026
Retailer 13£762 GBP
Retailer 12£765 GBP
Retailer 11£898 GBP
Retailer 8£963 GBP
Retailer 10£963 GBP
Retailer 2£992 GBP
Retailer 9£993 GBP
Retailer 5£1,008 GBP
Retailer 7£1,085 GBP
Retailer 6£1,103 GBP
Retailer 3£1,129 GBP
Retailer 4£1,212 GBP
Cape Diamonds£1,308 GBP

38 data points across 13 retailers

13 retailers£762 GBP to £1,308 GBP

A
Cheapest Retailer
-
£762 GBP
$1,021 USD
A
Retailer 2
-
£765 GBP
$1,025 USD
View
B+
Retailer 3
-
£898 GBP
$1,203 USD
View
B
Retailer 4
-
£963 GBP
$1,290 USD
View
B
Retailer 5
-
£963 GBP
$1,290 USD
View
B+
Retailer 6
-
£992 GBP
View
B+
Retailer 7
-
£993 GBP
$1,330 USD
View
B+
Retailer 8
-
£1,008 GBP
A$2,078 AUD
View
B
Retailer 9
-
£1,085 GBP
View
B+
Retailer 10
-
£1,103 GBP
€1,408 EUR
View
B
Retailer 11
-
£1,129 GBP
$1,513 USD
View
B
Retailer 12
-
£1,212 GBP
$1,624 USD
View
Most Expensive
B
Cape Diamonds
cert_1559817085 · Oct 26
£1,308 GBP
ZAR 28,315 ZAR
View
12 more retailers have this diamond
Prices start from £762 GBPSave up to £546 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
£762 GBP