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0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 7561043179

Certificate GIA 7561043179

Diamond specifications and retailer prices

From £427 GBP
SGD 775 SGD
As of November 3, 2026
Save £370 GBP (46%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £798 GBP at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.66ct natural round diamond

This 0.66ct 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 7561043179. Listed at 10 retailers as of November 2, 2026, with prices from £427 to £798, a £370 spread on the same certified stone. Frank Darling lists it at £798. 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

0.66
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 7561043179
Dimensions5.58 × 5.59 × 3.49 mm
L/W Ratio1.00
Culet sizeNone
Top View
5.58 mm5.59 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7561043179
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.6%

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 3
Current: £798 GBP|Low: £310 GBP|High: £817 GBP|Avg: £598 GBP|-2.3%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 3£310 GBP
Retailer 2£427 GBP
Retailer 11£483 GBP
Retailer 5£492 GBP
Retailer 10£576 GBP
Retailer 8£628 GBP
Retailer 6£667 GBP
Retailer 4£674 GBP
Retailer 9£676 GBP
Retailer 7£726 GBP
Frank Darling£798 GBP

32 data points across 11 retailers

10 retailers£427 GBP to £798 GBP

A
Cheapest Retailer
-
£427 GBP
SGD 775 SGD
A
Retailer 2
-
£483 GBP
SGD 876 SGD
View
A
Retailer 3
-
£492 GBP
$660 USD
View
A
Retailer 4
-
£576 GBP
$773 USD
View
A
Retailer 5
-
£628 GBP
$843 USD
View
B+
Retailer 6
-
£667 GBP
View
B+
Retailer 7
-
£674 GBP
€862 EUR
View
B+
Retailer 8
-
£676 GBP
$907 USD
View
Retailer 9
-
£726 GBP
$974 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2678782HK · Nov 2
£798 GBP
$1,071 USD
View
9 more retailers have this diamond
Prices start from £427 GBPSave up to £370 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
0.66ct Round
£427 GBP