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0.65ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1559064758

Certificate GIA 1559064758

Diamond specifications and retailer prices

From £576 GBP
$772 USD
As of October 31, 2026
Save £360 GBP (38%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £937 GBP at Frank Darling · As of October 31, 2026
View at Frank Darling

About this 0.65ct natural round diamond

This 0.65ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559064758. Listed at 15 retailers as of October 31, 2026, with prices from £576 to £937, a £360 spread on the same certified stone. Frank Darling lists it at £937. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1559064758
Dimensions5.50 × 5.53 × 3.46 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.50 mm5.53 mm0.65 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559064758
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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: £937 GBP|Low: £576 GBP|High: £952 GBP|Avg: £732 GBP|-1.3%
Frank Darling
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
November 1, 2026
Retailer 11£576 GBP
Retailer 3£590 GBP
Retailer 12£604 GBP
Retailer 6£627 GBP
Retailer 5£640 GBP
Retailer 10£648 GBP
Retailer 8£668 GBP
Retailer 2£722 GBP
Retailer 13£724 GBP
Retailer 9£820 GBP
Retailer 7£839 GBP
Retailer 14£878 GBP
Retailer 4£934 GBP
Frank Darling£937 GBP

37 data points across 14 retailers

15 retailers£576 GBP to £937 GBP

A
Cheapest Retailer
-
£576 GBP
$772 USD
A
Retailer 2
-
£590 GBP
$790 USD
View
A
Retailer 3
-
£604 GBP
SGD 1,093 SGD
View
A
Retailer 4
-
£627 GBP
SGD 1,136 SGD
View
A
Retailer 5
-
£640 GBP
$858 USD
View
A
Retailer 6
-
£648 GBP
$868 USD
View
A
Retailer 7
-
£668 GBP
View
B+
Retailer 8
-
£722 GBP
$968 USD
View
B+
Retailer 9
-
£724 GBP
$970 USD
View
B+
Retailer 10
-
£748 GBP
$1,002 USD
View
B+
Retailer 11
-
£820 GBP
View
B+
Retailer 12
-
£839 GBP
€1,071 EUR
View
B+
Retailer 13
-
£878 GBP
$1,177 USD
View
B
Retailer 14
-
£934 GBP
$1,251 USD
View
Most Expensive
B
Frank Darling
2622538HK · Oct 31
£937 GBP
$1,255 USD
View
14 more retailers have this diamond
Prices start from £576 GBPSave up to £360 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
£576 GBP